We introduce a novel parametrization of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><mi>π</mi><mi>π</mi><mo>ℓ</mo><mi>ν</mi></math> form factors relying on partial-wave decompositions and series expansions in suitable variables. We bound the expansion coefficients through unitarity and include left-hand cut contributions using established dispersive methods. The two-hadron line shapes are treated in a model-independent manner using Omnès functions, thus allowing for a data-driven determination of the expansion parameters. We study the underlying composition of the di-pion system in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><mi>π</mi><mi>π</mi><mo>ℓ</mo><mi>ν</mi></math> decays through fits to differential spectra of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>+</mo></msup><mo stretchy="false">→</mo><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msup><mo>ℓ</mo><mo>+</mo></msup><mi>ν</mi></math> measured by the Belle experiment. In contrast to previous works, we are able to study the full phase space and are not limited to certain kinematic regions. As a consequence, we extract branching fractions for the different partial waves of the di-pion system. We find <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="script">B</mi><mo stretchy="false">(</mo><msup><mi>B</mi><mo>+</mo></msup><mo stretchy="false">→</mo><mo stretchy="false">(</mo><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msub><mo stretchy="false">)</mo><mi>S</mi></msub><msup><mo>ℓ</mo><mo>+</mo></msup><mi>ν</mi><mo stretchy="false">)</mo><mo>=</mo><msubsup><mn>2.2</mn><mrow><mo>−</mo><mn>1.0</mn></mrow><mrow><mo>+</mo><mn>1.4</mn></mrow></msubsup><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="script">B</mi><mo stretchy="false">(</mo><msup><mi>B</mi><mo>+</mo></msup><mo stretchy="false">→</mo><mo stretchy="false">(</mo><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msub><mo stretchy="false">)</mo><mi>P</mi></msub><msup><mo>ℓ</mo><mo>+</mo></msup><mi>ν</mi><mo stretchy="false">)</mo><mo>=</mo><mspace linebreak="goodbreak"></mspace><msubsup><mn>19.6</mn><mrow><mo>−</mo><mn>2.7</mn></mrow><mrow><mo>+</mo><mn>2.8</mn></mrow></msubsup><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="script">B</mi><mo stretchy="false">(</mo><msup><mi>B</mi><mo>+</mo></msup><mo stretchy="false">→</mo><mo stretchy="false">(</mo><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msub><mo stretchy="false">)</mo><mi>D</mi></msub><msup><mo>ℓ</mo><mo>+</mo></msup><mi>ν</mi><mo stretchy="false">)</mo><mo>=</mo><msubsup><mn>3.5</mn><mrow><mo>−</mo><mn>1.1</mn></mrow><mrow><mo>+</mo><mn>1.3</mn></mrow></msubsup><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></math>. In addition, we derive predictions for the thus far unobserved <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>+</mo></msup><mo stretchy="false">→</mo><msup><mi>π</mi><mn>0</mn></msup><msup><mi>π</mi><mn>0</mn></msup><msup><mo>ℓ</mo><mo>+</mo></msup><mi>ν</mi></math> decay and obtain a sizable branching fraction of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="script">B</mi><mo stretchy="false">(</mo><msup><mi>B</mi><mo>+</mo></msup><mo stretchy="false">→</mo><msup><mi>π</mi><mn>0</mn></msup><msup><mi>π</mi><mn>0</mn></msup><msup><mo>ℓ</mo><mo>+</mo></msup><mi>ν</mi><mo stretchy="false">)</mo><mo>=</mo><msubsup><mn>2.9</mn><mrow><mo>−</mo><mn>0.7</mn></mrow><mrow><mo>+</mo><mn>0.9</mn></mrow></msubsup><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></math>.

Switzerland

Florian Herren

Germany

Bastian Kubis

Raynette van Tonder

Model-independent parametrization of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><mi>π</mi><mi>π</mi><mo>ℓ</mo><mi>ν</mi></math> decays

We construct light cone sum rules (LCSR) for the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>K</mi><mo>*</mo></msup></math> form factors in the large recoil region using vacuum-to-<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi></math>-meson correlation functions, and systematically calculate subleading-power corrections to these form factors at tree level, including next-to-leading power contributions from the hard-collinear propagator, the subleading effective current <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mover accent="true"><mi>q</mi><mo stretchy="false">¯</mo></mover><mi mathvariant="normal">Γ</mi><mo stretchy="false">[</mo><mi>i</mi><msub><menclose notation="updiagonalstrike" other="updiag5"><mi>D</mi></menclose><mo>⊥</mo></msub><mo>/</mo><mo stretchy="false">(</mo><mn>2</mn><msub><mi>m</mi><mi>b</mi></msub><mo stretchy="false">)</mo><mo stretchy="false">]</mo><msub><mi>h</mi><mi>v</mi></msub></math>, and twist-five/six four-particle higher-twist effects. By incorporating the available leading-power results at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="script">O</mi><mo stretchy="false">(</mo><msub><mi>α</mi><mi>s</mi></msub><mo stretchy="false">)</mo></math> and the corrections to higher-twist <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi></math>-meson light cone distribution amplitudes from our previous work, we improve the precision of theoretical predictions for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>K</mi><mo>*</mo></msup></math> form factors and find that the subleading-power contributions amount to 30% of the corresponding leading-power results. Employing the Bourrely-Caprini-Lellouch parametrization, we determine the numerical results for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>K</mi><mo>*</mo></msup></math> form factors across the full kinematic range through a combined fit of LCSR predictions in the large recoil region and lattice QCD results in the small recoil region. Using the newly obtained <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>K</mi><mo>*</mo></msup></math> form factors, we compute the branching fractions for the rare decays <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>K</mi><mo>*</mo></msup><msub><mi>ν</mi><mo>ℓ</mo></msub><msub><mover accent="true"><mi>ν</mi><mo stretchy="false">¯</mo></mover><mo>ℓ</mo></msub></math> in the Standard Model, obtaining <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mrow><mi mathvariant="script">B</mi><mi mathvariant="script">R</mi></mrow><mo stretchy="false">(</mo><msup><mrow><mover accent="true"><mrow><mi>B</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mn>0</mn></msup><mo stretchy="false">→</mo><msup><mrow><mover accent="true"><mrow><mi>K</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mo>*</mo><mn>0</mn></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mo>ℓ</mo></mrow></msub><msub><mrow><mover accent="true"><mrow><mi>ν</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mo>ℓ</mo></mrow></msub><mo stretchy="false">)</mo><mo>=</mo><mn>8.09</mn><mo stretchy="false">(</mo><mn>96</mn><mo stretchy="false">)</mo><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>6</mn></mrow></msup></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="script">B</mi><mi mathvariant="script">R</mi></mrow><mo stretchy="false">(</mo><msup><mover accent="true"><mi>B</mi><mo stretchy="false">¯</mo></mover><mo>+</mo></msup><mo stretchy="false">→</mo><msup><mover accent="true"><mi>K</mi><mo stretchy="false">¯</mo></mover><mrow><mo>*</mo><mo>+</mo></mrow></msup><msub><mi>ν</mi><mo>ℓ</mo></msub><msub><mover accent="true"><mi>ν</mi><mo stretchy="false">¯</mo></mover><mo>ℓ</mo></msub><mo stretchy="false">)</mo><mo>=</mo><mn>9.95</mn><mo stretchy="false">(</mo><mn>1.05</mn><mo stretchy="false">)</mo><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>6</mn></mrow></msup></math>. Additionally, we predict that the longitudinal <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>K</mi><mo>*</mo></msup></math> polarization fraction is <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>F</mi><mi>L</mi></msub><mo>=</mo><mn>0.44</mn><mo stretchy="false">(</mo><mn>4</mn><mo stretchy="false">)</mo></math>.

Jing Gao

China

Ulf-G. Meißner

Yue-Long Shen

Dong-Hao Li

Precision calculations of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi><mo stretchy="false">→</mo><msup><mi>K</mi><mo>*</mo></msup></math> form factors from SCET sum rules beyond leading-power contributions

Big Bang nucleosynthes describes a significant process in the early universe, responsible for the formation of light nuclei a while after the Big Bang explosion. Its sensitivity to the expansion rate makes BBN an effective probe for testing deviations from standard cosmology, particularly within the framework of modified theories of gravity. In this article, we investigate the evolution of the Universe through Big Bang nucleosynthesis within the framework of <math altimg='si2.svg'><mi>f</mi><mo stretchy='false'>(</mo><mi>T</mi><mo>,</mo><mspace width='0.25em' /><mi>B</mi><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>T</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>B</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo stretchy='false'>)</mo></math> gravity. Here, <math altimg='si3.svg'><mi>T</mi><mo>,</mo><mspace width='0.25em' /><mi>B</mi><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>T</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub></math> and <math altimg='si4.svg'><msub><mrow><mi>B</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub></math> correspond to the torsion, boundary term, teleparallel Gauss-Bonnet term, and Gauss-Bonnet boundary term, respectively. To explore the deviation from the teleparallel equivalent of general relativity, we apply the transformation <math altimg='si2.svg'><mi>f</mi><mo stretchy='false'>(</mo><mi>T</mi><mo>,</mo><mspace width='0.25em' /><mi>B</mi><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>T</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>B</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo stretchy='false'>)</mo></math> = <math altimg='si5.svg'><mo linebreak='badbreak' linebreakstyle='after'>&#8722;</mo><mi>T</mi><mo linebreak='goodbreak' linebreakstyle='after'>+</mo><mi mathvariant='script'>F</mi><mo stretchy='false'>(</mo><mi>T</mi><mo>,</mo><mspace width='0.25em' /><mi>B</mi><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>T</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>B</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo stretchy='false'>)</mo></math>. For an in-depth analysis of the Big Bang nucleosynthesis, we choose five distinct models from gravity and compared the results with the observational limits on <math altimg='si6.svg'><mo stretchy='true'>|</mo><mfrac><mrow><mi mathvariant='normal'>&#916;</mi><msub><mrow><mi mathvariant='script'>T</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow><mrow><msub><mrow><mi mathvariant='script'>T</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow></mfrac><mo stretchy='true'>|</mo></math> to examine restrictions on the free parameters associated with these models. Our outcomes indicate that <math altimg='si2.svg'><mi>f</mi><mo stretchy='false'>(</mo><mi>T</mi><mo>,</mo><mspace width='0.25em' /><mi>B</mi><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>T</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo>,</mo><mspace width='0.25em' /><msub><mrow><mi>B</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo stretchy='false'>)</mo></math> gravity can agree with the constraint of big bang nucleosynthesis, and hence build a valid view of the universe. Moreover, we take the limiting cases of the assumed theory, that is, <math altimg='si7.svg'><mi>f</mi><mo stretchy='false'>(</mo><mi>T</mi><mo>,</mo><mi>B</mi><mo stretchy='false'>)</mo></math> and <math altimg='si8.svg'><mi>f</mi><mo stretchy='false'>(</mo><mi>T</mi><mo stretchy='false'>)</mo></math> theories, which also ensure consistency with BBN data.

Pakistan

Abdul Malik Sultan

Manahil Ali

Shamaila Rani

Azerbaijan

Nadeem Azhar

Kazakhstan

N. Myrzakulov

Uzbekistan

Sanjar Shaymatov

Constraining Big Bang nucleosynthesis in <math altimg='si1.svg'><mi>f</mi><mo stretchy='false'>(</mo><mi>T</mi><mo>,</mo><mi>B</mi><mo>,</mo><msub><mrow><mi>T</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo>,</mo><msub><mrow><mi>B</mi></mrow><mrow><mi mathvariant='script'>G</mi></mrow></msub><mo stretchy='false'>)</mo></math> gravity

The semi-leptonic $\textit{b}$ → $\textit{clν}$ processes are receiving a lot of attention, as the lepton flavor universality (LFU) violation has been hinted by the measured ratios $$ {R}_{D^{\left(\ast \right)}} $$ = Γ($\textit{B}$ → $\textit{D}$ $\textit{τν}$)/Γ($\textit{B}$ → $\textit{D}$ $\textit{ℓν}$) for $\textit{ℓ}$ = $\textit{e}$, $\textit{μ}$. Recently, it has also been pointed out that the baryonic counterpart, $$ {R}_{\Lambda_c} $$ = Γ(Λ → Λ $\textit{τν}$)/Γ(Λ → Λ $\textit{ℓν}$), has a strong correlation with $$ {R}_{D^{\left(\ast \right)}} $$ , referred to as the $\textit{R}$ ratio sum rule in this paper. The correlation is almost independent of the new physics (NP) implication and hence can predict $$ {R}_{\Lambda_c} $$ from the measured $$ {R}_{D^{\left(\ast \right)}} $$ . On the other hand, we have fewer measurements and/or theoretical studies of the semi-leptonic $\textit{b}$ → $\textit{ulν}$ processes, although the same arguments can be applied to the ratios $\textit{R}$ , $\textit{R}$ , and $\textit{R}$ as above. Since these processes are measurable at the ongoing LHCb run-3 and/or Belle II experiments, precise studies on them are important as well. In this paper, we obtain the semi-analytic formulae for all the aforementioned $\textit{R}$ ratios in the presence of NP contributions by using the available lattice QCD and/or light-cone sum rule fits to the form factors. Two novel points are highlighted: (i) We evaluate uncertainties of $\textit{R}$ including both the Standard Model (SM) and NP terms, inherited from the form factor fits, and discuss how the uncertainties affect the $\textit{R}$ ratio sum rules. (ii) We obtain the $\textit{R}$ ratio sum rule among the semi-leptonic $\textit{b}$ → $\textit{ulν}$ processes for the first time, which provides a complementary motivation for observing these processes. In addition, based on our numerical results, we investigate how the different NP scenarios work in the $\textit{b}$ → $\textit{c}$ and $\textit{b}$ → $\textit{u}$ sectors and perform a combined study in the framework of SM effective field theory with specific flavor symmetries.

Wen-Feng Duan

Japan

Syuhei Iguro

Xin-Qiang Li

Ryoutaro Watanabe

Ya-Dong Yang

On sum rules for semi-leptonic $\textit{b}$ → $\textit{c}$ and $\textit{b}$ → $\textit{u}$ decays

Following up on our earlier study [J. Bardhan et al., <a href="http://dx.doi.org/10.1103/PhysRevD.107.115001">Phys. Rev. D 107, 115001 (2023)</a>], we investigate the LHC prospects of pair-produced vectorlike <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>B</mi></mrow></math> quarks decaying exotically to a new gauge-singlet (pseudo)scalar field <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="normal">Φ</mi></math> and a <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>b</mi></math> quark. After the electroweak symmetry breaking, the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="normal">Φ</mi></math> decays predominantly to <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>g</mi><mi>g</mi><mo>/</mo><mi>b</mi><mi>b</mi></math> final states, leading to a fully hadronic <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>2</mn><mi>b</mi><mo>+</mo><mn>4</mn><mi>j</mi></math> or <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>6</mn><mi>b</mi></math> signature. Because of the large Standard Model background and the lack of leptonic handles, it is a difficult channel to probe. To overcome the challenge, we employ a hybrid deep learning model containing a graph neural network followed by a deep neural network. We estimate that such a state-of-the-art deep learning analysis pipeline can lead to a performance comparable to that in the semileptonic mode, taking the discovery (exclusion) reach up to about <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>M</mi></mrow><mrow><mi>B</mi></mrow></msub><mo>=</mo><mn>1.8</mn><mo stretchy="false">(</mo><mn>2.4</mn><mo stretchy="false">)</mo><mtext> </mtext><mtext> </mtext><mi>TeV</mi></mrow></math> at HL-LHC when <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi></math> decays fully exotically, i.e., <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>BR</mi><mo stretchy="false">(</mo><mi>B</mi><mo stretchy="false">→</mo><mi>b</mi><mi mathvariant="normal">Φ</mi><mo stretchy="false">)</mo><mo>=</mo><mn>100</mn><mo>%</mo></mrow></math>.

India

Jai Bardhan

Tanumoy Mandal

Subhadip Mitra

Cyrin Neeraj

Mihir Rawat

Tagging fully hadronic exotic decays of the vectorlike <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>B</mi></mrow></math> quark using a graph neural network

Spectroscopic parameters and widths of the tensor hybrid mesons <math altimg='si2.svg'><msub><mrow><mi>H</mi></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> and <math altimg='si239.svg'><msub><mrow><mover accent='true'><mrow><mi>H</mi></mrow><mrow><mo>&#732;</mo></mrow></mover></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> with the structure <math altimg='si1.svg'><mover accent='true'><mrow><mi>b</mi></mrow><mo>&#8254;</mo></mover><mi>g</mi><mi>c</mi></math> and spin-parities <math altimg='si4.svg'><msup><mrow><mi>J</mi></mrow><mrow><mi mathvariant='normal'>P</mi></mrow></msup><mo linebreak='goodbreak' linebreakstyle='after'>=</mo><msup><mrow><mn>2</mn></mrow><mrow><mo linebreak='badbreak' linebreakstyle='after'>&#8722;</mo></mrow></msup></math> and <math altimg='si5.svg'><msup><mrow><mi>J</mi></mrow><mrow><mi mathvariant='normal'>P</mi></mrow></msup><mo linebreak='goodbreak' linebreakstyle='after'>=</mo><msup><mrow><mn>2</mn></mrow><mrow><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup></math> are calculated with high accuracy in the QCD sum rule framework. Information on their masses <math altimg='si6.svg'><mi>m</mi><mo linebreak='goodbreak' linebreakstyle='after'>=</mo><mo stretchy='false'>(</mo><mn>7.214</mn><mo>&#177;</mo><mn>0.075</mn><mo stretchy='false'>)</mo><mspace width='0.25em' /><mrow><mi mathvariant='normal'>GeV</mi></mrow></math> and <math altimg='si7.svg'><mover accent='true'><mrow><mi>m</mi></mrow><mrow><mo>&#732;</mo></mrow></mover><mo linebreak='goodbreak' linebreakstyle='after'>=</mo><mo stretchy='false'>(</mo><mn>7.685</mn><mo>&#177;</mo><mn>0.040</mn><mo stretchy='false'>)</mo><mspace width='0.25em' /><mrow><mi mathvariant='normal'>GeV</mi></mrow></math> enable us to determine decay channels of <math altimg='si2.svg'><msub><mrow><mi>H</mi></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> and <math altimg='si239.svg'><msub><mrow><mover accent='true'><mrow><mi>H</mi></mrow><mrow><mo>&#732;</mo></mrow></mover></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math>. The full width of the meson <math altimg='si2.svg'><msub><mrow><mi>H</mi></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> is estimated by considering the decays <math altimg='si8.svg'><msub><mrow><mi>H</mi></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub><mo stretchy='false'>&#8594;</mo><msup><mrow><mi>D</mi></mrow><mrow><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup><msup><mrow><mover accent='true'><mrow><mi>B</mi></mrow><mo>&#8254;</mo></mover></mrow><mrow><mo>&#8270;</mo><mn>0</mn></mrow></msup></math> and <math altimg='si9.svg'><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup><msup><mrow><mi>B</mi></mrow><mrow><mo>&#8270;</mo><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup></math>. The channels <math altimg='si10.svg'><msub><mrow><mover accent='true'><mrow><mi>H</mi></mrow><mrow><mo>&#732;</mo></mrow></mover></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub><mo stretchy='false'>&#8594;</mo><msup><mrow><mi>B</mi></mrow><mrow><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup></math>, <math altimg='si11.svg'><msup><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msup><msup><mrow><mi>D</mi></mrow><mrow><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup></math>, <math altimg='si12.svg'><msup><mrow><mi>B</mi></mrow><mrow><mo>&#8270;</mo><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup><msup><mrow><mi>D</mi></mrow><mrow><mo>&#8270;</mo><mn>0</mn></mrow></msup></math>, <math altimg='si13.svg'><msup><mrow><mi>B</mi></mrow><mrow><mo>&#8270;</mo><mn>0</mn></mrow></msup><msup><mrow><mi>D</mi></mrow><mrow><mo>&#8270;</mo><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msup></math>, <math altimg='si14.svg'><msubsup><mrow><mi>B</mi></mrow><mrow><mi>s</mi></mrow><mrow><mn>0</mn></mrow></msubsup><msubsup><mrow><mi>D</mi></mrow><mrow><mi>s</mi></mrow><mrow><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msubsup></math>, and <math altimg='si15.svg'><msubsup><mrow><mi>B</mi></mrow><mrow><mi>s</mi></mrow><mrow><mo>&#8270;</mo><mn>0</mn></mrow></msubsup><msubsup><mrow><mi>D</mi></mrow><mrow><mi>s</mi></mrow><mrow><mo>&#8270;</mo><mo linebreak='badbreak' linebreakstyle='after'>+</mo></mrow></msubsup></math> are studied to find the width of the <math altimg='si239.svg'><msub><mrow><mover accent='true'><mrow><mi>H</mi></mrow><mrow><mo>&#732;</mo></mrow></mover></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> state. The widths of these processes are calculated using QCD three-point sum rule approach, which require estimation of the strong couplings at hybrid-meson-meson vertices. The results <math altimg='si16.svg'><mo stretchy='false'>(</mo><mn>50.8</mn><mo>&#177;</mo><mn>9.8</mn><mo stretchy='false'>)</mo><mspace width='0.25em' /><mrow><mi mathvariant='normal'>MeV</mi></mrow></math> and <math altimg='si17.svg'><mo stretchy='false'>(</mo><mn>184.3</mn><mo>&#177;</mo><mn>22.8</mn><mo stretchy='false'>)</mo><mspace width='0.25em' /><mrow><mi mathvariant='normal'>MeV</mi></mrow></math> for the full widths of the hybrid mesons <math altimg='si2.svg'><msub><mrow><mi>H</mi></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> and <math altimg='si239.svg'><msub><mrow><mover accent='true'><mrow><mi>H</mi></mrow><mrow><mo>&#732;</mo></mrow></mover></mrow><mrow><mi mathvariant='normal'>bc</mi></mrow></msub></math> characterize them as relatively narrow and broad structures, respectively.

S.S. Agaev

Iran

Türkiye

K. Azizi

H. Sundu

Tensor hybrid mesons <math altimg='si1.svg'><mover accent='true'><mrow><mi>b</mi></mrow><mo>&#8254;</mo></mover><mi>g</mi><mi>c</mi></math>

This study investigates the decay modes of the $\textit{B}$ meson, focusing on semileptonic and nonleptonic decay into S and P wave charmonia. The primary objective is to extract the shape parameter of the $\textit{B}$ meson distribution amplitude through a data-driven approach, utilizing the lattice results on $\textit{B}$ → $\textit{η}$ , $\textit{J}$/$\textit{ψ}$ semileptonic form factors and yielding an estimate of $\textit{ω}$ = 0.998(34) GeV for the same. We use the form factors derived from the modified perturbative QCD framework in the analysis. This result and various other inputs on the radiative decays of the P wave charmonia enable us to estimate the $\textit{q}$ shapes of the $\textit{B}$ → $\textit{χ}$ , $\textit{χ}$ and $\textit{h}$ form factors using pole expansion parametrization. Using these results, we have obtained predictions of LFUV observables $\textit{R}$($\textit{χ}$ ) = 0.169(11), $\textit{R}$($\textit{χ}$ ) = 0.126(2) and $\textit{R}$($\textit{h}$ ) = 0.113(3). Finally, we have presented predictions for branching ratios of some nonleptonic decay modes of the $\textit{B}$ meson into S and P wave charmonia in the same modified perturbative QCD framework.

Utsab Dey

Soumitra Nandi

Correlated study on some $\textit{B}$

A study of the charmless baryonic decays $$ {B}_{(s)}^0\to {K}^0p\overline{p} $$ is presented, where $$ {B}_{(s)}^0 $$ denotes either a $\textit{B}$ or a $$ {B}_s^0 $$ meson. The analysis is based on proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb . The decay $$ {B}_s^0\to {K}^0p\overline{p} $$ is observed for the first time, with a measured branching fraction of (9$\textit{.}$14 $\textit{±}$ 1$\textit{.}$69 $\textit{±}$ 0$\textit{.}$90 $\textit{±}$ 0$\textit{.}$33 $\textit{±}$ 0$\textit{.}$20) $\textit{×}$ 10 and a significance of 5.6$\textit{σ}$. The uncertainties respectively account for statistical and systematic contributions, the precision of the branching fraction of the normalisation channel $\textit{B}$ $\textit{→ K}$ $\textit{π}$ $\textit{π}$ and the fragmentation fraction ratio $\textit{f}$ $\textit{/f}$ . The branching fraction determined for $$ {B}^0\to {K}^0p\overline{p} $$ is (2$\textit{.}$82 $\textit{±}$ 0$\textit{.}$08 $\textit{±}$ 0$\textit{.}$12 $\textit{±}$ 0$\textit{.}$10) $\textit{×}$ 10 , which is the most precise measurement to date.

Netherlands

R. Aaij

United Kingdom

A. Abdelmotteleb

C. Abellan Beteta

F. Abudinén

T. Ackernley

United States

A. Adefisoye

Spain

B. Adeva

M. Adinolfi

Sweden

P. Adlarson

France

C. Agapopoulou

C. Aidala

Z. Ajaltouni

S. Akar

K. Akiba

Italy

P. Albicocco

J. Albrecht

F. Alessio

Z. Aliouche

P. Alvarez Cartelle

R. Amalric

Brazil

S. Amato

J. Amey

Y. Amhis

L. An

L. Anderlini

M. Andersson

A. Andreianov

P. Andreola

M. Andreotti

D. Andreou

A. Anelli

D. Ao

F. Archilli

M. Argenton

Costa Rica

S. Arguedas Cuendis

A. Artamonov

M. Artuso

E. Aslanides

R. Ataíde Da Silva

M. Atzeni

B. Audurier

D. Bacher

I. Bachiller Perea

S. Bachmann

M. Bachmayer

J. Back

P. Baladron Rodriguez

V. Balagura

A. Balboni

W. Baldini

L. Balzani

H. Bao

J. Baptista de Souza Leite

C. Barbero Pretel

M. Barbetti

I. Barbosa

R. Barlow

M. Barnyakov

S. Barsuk

W. Barter

J. Bartz

Poland

S. Bashir

B. Batsukh

P. Battista

A. Bay

A. Beck

M. Becker

F. Bedeschi

I. Bediaga

N. Behling

S. Belin

K. Belous

I. Belov

I. Belyaev

G. Benane

G. Bencivenni

E. Ben-Haim

A. Berezhnoy

R. Bernet

S. Bernet Andres

A. Bertolin

C. Betancourt

F. Betti

J. Bex

Ia. Bezshyiko

Ukraine

O. Bezshyyko

J. Bhom

M. Bieker

N. Biesuz

P. Billoir

A. Biolchini

M. Birch

F. Bishop

A. Bitadze

A. Bizzeti

T. Blake

F. Blanc

J. Blank

S. Blusk

V. Bocharnikov

Observation of the decay $$ {B}_s^0\to {K}^0p\overline{p} $$ and measurement of the $$ {B}_{(s)}^0\to {K}^0p\overline{p} $$ branching fractions

We study the decay of a heavy CP-even neutral Higgs into an on-shell Standard Model-like Higgs boson and two photons, $\textit{H}$ → $\textit{hγγ}$, in the two-Higgs doublet model. We argue that the decay channel $\textit{H}$ → $\textit{hγγ}$, followed by the decay of the Standard Model Higgs $$ h\to b\overline{b} $$ , could be observed at the 5$\textit{σ}$ level at the High-Luminosity LHC for masses of the heavy Higgs up to 950 GeV for the type-II, 650 GeV for the Lepton Specific and the Flipped 2HDMs, and 350 GeV for the type-I. We also discuss the possible role of the decay $\textit{H}$ → $\textit{hγγ}$ in discriminating among different types of 2HDMs and in enhancing the total number of events in the final state $$ H\to b\overline{b}\gamma \gamma $$ compared to the cascade decay $\textit{H}$ → $\textit{hh}$ followed by $\textit{h}$ → $\textit{γγ h}$ → $$ b\overline{b} $$ with identical final state (although with different kinematical distributions).

Mexico

M. Arroyo-Ureña

Alejandro Ibarra

Pablo Roig

T. Valencia-Pérez

Prospects for detecting the rare heavy Higgs decay $\textit{H}$ → $\textit{hγγ}$ through the $$ H\to b\overline{b}\gamma \gamma $$ channel at the LHC

The first evidence for the decay <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>B</mi></mrow><mrow><mo>−</mo></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msup><msup><mrow><mi>τ</mi></mrow><mrow><mo>−</mo></mrow></msup><msub><mrow><mover accent="true"><mrow><mi>ν</mi></mrow><mrow><mo stretchy="true">¯</mo></mrow></mover></mrow><mrow><mi>τ</mi></mrow></msub></mrow></math> is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>9</mn><mtext> </mtext><mtext> </mtext><msup><mi>fb</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math>, at centre-of-mass energies of 7, 8, and 13 TeV. Here, the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>D</mi><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msup></math> meson represents any of the three excited charm mesons <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>D</mi><mn>1</mn></msub><mo stretchy="false">(</mo><mn>2420</mn><msup><mo stretchy="false">)</mo><mn>0</mn></msup></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msubsup><mi>D</mi><mn>2</mn><mo>*</mo></msubsup><mo stretchy="false">(</mo><mn>2460</mn><msup><mo stretchy="false">)</mo><mn>0</mn></msup></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msubsup><mi>D</mi><mn>1</mn><mo>′</mo></msubsup><mo stretchy="false">(</mo><mn>2400</mn><msup><mo stretchy="false">)</mo><mn>0</mn></msup></math>. The <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>−</mo></msup><mo stretchy="false">→</mo><mrow><msup><mi>D</mi><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msup><msup><mi>τ</mi><mo>−</mo></msup><msub><mover accent="true"><mi>ν</mi><mo stretchy="false">¯</mo></mover><mi>τ</mi></msub></mrow></math> signal is measured with a significance of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>3.5</mn><mi>σ</mi></math>, including systematic uncertainties. The combined branching fraction <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="script">B</mi><mo stretchy="false">(</mo><msup><mrow><mi>B</mi></mrow><mrow><mo>−</mo></mrow></msup><mo stretchy="false">→</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mn>1</mn><mo>,</mo><mn>2</mn></mrow><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msubsup><msup><mrow><mi>τ</mi></mrow><mrow><mo>−</mo></mrow></msup><msub><mrow><mover accent="true"><mrow><mi>ν</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mi>τ</mi></mrow></msub><mo stretchy="false">)</mo><mo>×</mo><mi mathvariant="script">B</mi><mo stretchy="false">(</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mn>1</mn><mo>,</mo><mn>2</mn></mrow><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msubsup><mo stretchy="false">→</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>*</mo><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><mo stretchy="false">)</mo></mrow></math>, where <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msubsup><mi>D</mi><mrow><mn>1</mn><mo>,</mo><mn>2</mn></mrow><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msubsup></math> denotes both <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>D</mi><mn>1</mn></msub><mo stretchy="false">(</mo><mn>2420</mn><msup><mo stretchy="false">)</mo><mn>0</mn></msup></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msubsup><mi>D</mi><mn>2</mn><mo>*</mo></msubsup><mo stretchy="false">(</mo><mn>2460</mn><msup><mo stretchy="false">)</mo><mn>0</mn></msup></math> contributions, is measured to be <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mo stretchy="false">[</mo><mn>0.051</mn><mo>±</mo><mn>0.013</mn><mrow><mo stretchy="false">(</mo><mi>stat</mi><mo stretchy="false">)</mo></mrow><mo>±</mo><mn>0.006</mn><mrow><mo stretchy="false">(</mo><mi>syst</mi><mo stretchy="false">)</mo></mrow><mo>±</mo><mn>0.009</mn><mo stretchy="false">(</mo><mi>ext</mi><mo stretchy="false">)</mo><mo stretchy="false">]</mo><mo>%</mo></mrow></math>, where the last uncertainty reflects that of the branching fraction of the normalization channel <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>−</mo></msup><mo stretchy="false">→</mo><mrow><msubsup><mi>D</mi><mrow><mn>1</mn><mo>,</mo><mn>2</mn></mrow><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msubsup><msup><msubsup><mi>D</mi><mi>s</mi><mo>−</mo></msubsup><mrow><mo stretchy="false">(</mo><mo>*</mo><mo stretchy="false">)</mo></mrow></msup></mrow></math>. The ratio between the tauonic and muonic semileptonic <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>B</mi></math> decays, with the latter taken from world average values, is also determined and found to be <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="script">R</mi><mo stretchy="false">(</mo><msubsup><mrow><mi>D</mi></mrow><mrow><mn>1</mn><mo>,</mo><mn>2</mn></mrow><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msubsup><mo stretchy="false">)</mo><mo>=</mo><mn>0.13</mn><mo>±</mo><mn>0.03</mn><mrow><mo stretchy="false">(</mo><mi>stat</mi><mo stretchy="false">)</mo></mrow><mo>±</mo><mn>0.01</mn><mrow><mo stretchy="false">(</mo><mi>syst</mi><mo stretchy="false">)</mo></mrow><mo>±</mo><mn>0.02</mn><mo stretchy="false">(</mo><mi>ext</mi><mo stretchy="false">)</mo></mrow></math>.

A.S.W. Abdelmotteleb

A.A. Adefisoye

C.A. Aidala

CERN

J.L. Amey

J.J. Back

I.R. Barbosa

R.J. Barlow

M. Bartolini

J.M. Basels

G. Bassi

P.B. Battista

I.B. Bediaga

N.A. Behling

M.S. Bieker

N.V. Biesuz

F.C.R. Bishop

J.E. Blank

Evidence for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>−</mo></msup><mo stretchy="false">→</mo><msup><mi>D</mi><mrow><mo>*</mo><mo>*</mo><mn>0</mn></mrow></msup><msup><mi>τ</mi><mo>−</mo></msup><mover accent="true"><msub><mi>ν</mi><mi>τ</mi></msub><mo stretchy="true">¯</mo></mover></math> Decays