We report an experimental investigation of an unexplored breakup pathway of 6Li proceeding via one-proton stripping to the unbound 5He nucleus, followed by its decay into <math altimg='si22.svg'><mrow><mi>&#945;</mi><mo linebreak='goodbreak'>+</mo><mi>n</mi></mrow></math>, in the 6Li + 112Sn reaction at <math altimg='si3.svg'><mrow><msub><mi>E</mi><mrow><mrow><mi mathvariant='normal'>b</mi></mrow><mi>e</mi><mi>a</mi><mi>m</mi></mrow></msub><mo linebreak='goodbreak'>=</mo><mn>30</mn></mrow></math> MeV. Coincident <italic>&#945;</italic>- <italic>n</italic> events were measured using an array of silicon strip telescopes in conjunction with liquid scintillator neutron detectors. Successive kinematical cuts on the reconstructed projectile-like, fragment energies and Q-values enabled a clear separation of contributions arising purely through 5He <math altimg='si6.svg'><mrow><mo>&#8594;</mo><mi>&#945;</mi><mo linebreak='goodbreak'>+</mo><mi>n</mi></mrow></math> from competing processes such as evaporation following complete and incomplete fusion. The resultant relative energy distributions exhibit a pronounced peak at 0.84 MeV, indicating sequential breakup through the first unbound resonance 5He(3/2 <math altimg='si23.svg'><msup><mrow /><mo>&#8722;</mo></msup></math>) and show good agreement with Monte-Carlo simulations. Absolute breakup cross-sections for the ( 6Li, 5He&#8239;&#8594;&#8239; <italic>&#945;n</italic>) channel are determined using the efficiency-corrected yields. In addition, angular distributions for elastic scattering and breakup cross sections are interpreted within coupled-channels (CDCC+CRC) framework. The present results provide valuable insight into transfer-induced breakup dynamics of weakly bound nuclei near the Coulomb barrier.

India

Tanya Singh

S. Santra

P.C. Rout

A. Pal

A. Baishya

H. Kumawat

T. Santhosh

M. Meher

Jyotisankar Das

Ramandeep Gandhi

Sequential breakup of 6Li via ( 6Li, 5He <math altimg='si6.svg'><mrow><mo>&#8594;</mo><mi>&#945;</mi><mo linebreak='goodbreak'>+</mo><mi>n</mi></mrow></math>) reaction

In this study, we investigate the possibility of enhancing the di-jet resonance searches by tagging the final state radiation (FSR) jet using an event-level deep neural network. It is found that solely relying on the 4-momenta of the leading three jets allows the algorithm to achieve good discriminating power that can identify the hardest FSR jet in the signal while rejecting other soft jets. Once the invariant mass is corrected with the tagged FSR jet, the mass resolution of the signal is greatly enhanced, and the sensitivity of the search is also improved by more than 10%. By crafting the input variables carefully, the algorithm introduces minimal mass sculpting for the background, and its applicability extends to a broad mass range. This work proves that FSR jet tagging can potentially enhance di-jet resonance searches, suiting various stages of the physics programmes at the Large Hadron Collider (LHC) and High-Luminosity LHC (HL-LHC).

China

Bingxuan Liu

Yuxuan Shen

Yuanshunzi Sui

Enhancing di-jet resonance searches via a final-state radiation jet tagging algorithm * Bingxuan Liu is supported by Shenzhen Campus of the Sun Yat-sen University under project 74140-12255011, and by the Young Scientists Fund (C Class) of the National Natural Science Foundation of China (12405122). Both Yuxuan Shen and Yuanshunzi Sui are supported by College Students’ Innovative Entrepreneurial Training Plan Program

In this work, we perform a comprehensive investigation of the production of high-spin <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ω</mi><mi>J</mi></msub></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ρ</mi><mi>J</mi></msub></math> mesons (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>J</mi><mo>=</mo><mn>2</mn></math>, 3, 4, 5) in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>π</mi><mo>−</mo></msup><mi>p</mi></math> reactions using an effective Lagrangian approach. By constructing the relevant <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>t</mi></math>-channel processes and calibrating the model with a single adjustable parameter fitted to existing data, we successfully reproduce the measured total and differential cross sections for the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>J</mi><mo>=</mo><mn>3</mn></math> states <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ω</mi><mn>3</mn></msub><mo stretchy="false">(</mo><mn>1670</mn><mo stretchy="false">)</mo></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ρ</mi><mn>3</mn></msub><mo stretchy="false">(</mo><mn>1690</mn><mo stretchy="false">)</mo></math>. Within the same framework, we predict the production cross sections for their lower- and higher-spin partners; <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ω</mi><mn>2</mn></msub><mo stretchy="false">(</mo><mn>1975</mn><mo stretchy="false">)</mo></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ρ</mi><mn>2</mn></msub><mo stretchy="false">(</mo><mn>1940</mn><mo stretchy="false">)</mo></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ω</mi><mn>4</mn></msub><mo stretchy="false">(</mo><mn>2250</mn><mo stretchy="false">)</mo></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ρ</mi><mn>4</mn></msub><mo stretchy="false">(</mo><mn>2230</mn><mo stretchy="false">)</mo></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ω</mi><mn>5</mn></msub><mo stretchy="false">(</mo><mn>2350</mn><mo stretchy="false">)</mo></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ρ</mi><mn>5</mn></msub><mo stretchy="false">(</mo><mn>2350</mn><mo stretchy="false">)</mo></math>. Our results show that these states exhibit measurable cross sections with characteristically forward-peaked angular distributions, underscoring their strong potential for observation in future <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>π</mi><mi>p</mi></math> meson-beam experiments.

Ting-Yan Li

Zi-Yue Bai

Xiang Liu

Production of high-spin <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ω</mi><mi>J</mi></msub></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ρ</mi><mi>J</mi></msub></math> (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>J</mi><mo>=</mo><mn>2</mn></mrow></math>, 3, 4, 5) mesons in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>π</mi><mo>−</mo></msup><mi>p</mi></math> reactions

The moduli space and generalised global symmetries of 3d $$ \mathcal{N}=5 $$ superconformal field theories are investigated, with a focus on the orthosymplectic ABJ theories and their discrete gauging variants. We extend the known classification of $$ \mathcal{N}=5 $$ moduli spaces as orbifolds ℍ $\textit{/}$Γ, where Γ is a quaternionic reflection group, to theories incorporating Spin, O , and Pin-type gauge groups. In these cases, we find that the moduli space is governed not by Γ itself, but by a ℤ central extension thereof, for which we explicitly describe the generators. We provide a systematic method to construct the group Γ$\textit{′}$ governing the moduli space of a theory 𝒯$\textit{′}$ obtained by gauging a ℤ zero-form symmetry of an original theory 𝒯. This is achieved by identifying the specific generator that must be added to Γ. We compute the Hilbert series for these moduli spaces and verify them against the corresponding limits of the superconformal index, finding perfect agreement. We also discuss how ’t Hooft anomalies for the zero-form symmetries manifest in the superconformal index and the moduli space. Furthermore, we revisit the symmetry category of the 𝔰𝔬(2$\textit{N}$) × 𝔲𝔰𝔭(2$\textit{N}$) theories. Building on previous work that identified the symmetry category for all parities of $\textit{N}$ and $\textit{k}$, we provide the explicit symmetry webs for the opposite parity $\textit{D}$ case. We find that the details of these webs differ from the previously studied $\textit{D}$ webs corresponding to the both even parity case. Finally, we analyse theories with unequal ranks, those containing the 𝔰𝔬(2$\textit{N}$ + 1) gauge algebra, and the two SCFT variants based on the $\textit{F}$(4) superalgebra.

Italy

Sebastiano Garavaglia

William Harding

United Kingdom

Deshuo Liu

Thailand

Noppadol Mekareeya

Interplay of generalised symmetries and moduli spaces in 3d $$ \mathcal{N}=5 $$ SCFTs

We consider supersymmetric solutions of $\textit{D}$ = 5 Euclidean gauged supergravity coupled to an arbitrary number of vector multiplets. We consider solutions that admit both the R-symmetry Killing vector, $$ \mathcal{K} $$ , constructed as a bilinear in the Killing spinor, as well as an additional Killing vector $\textit{ℓ}$. Using $\textit{ℓ}$ to perform a dimensional reduction to $\textit{D}$ = 4, $$ \mathcal{N} $$ = 2 gauged supergravity, we show how the $\textit{D}$ = 5 on-shell action can be computed using equivariant localization. We illustrate the formalism with some examples, computing the supersymmetric Casimir energy and the supersymmetric index of the dual SCFT without using the explicit supergravity solutions.

Switzerland

Pietro Genolini

Jerome Gauntlett

Yusheng Jiao

Jaeha Park

James Sparks

Equivariant localization for $\textit{D}$ = 5 gauged supergravity

The exact localization result for the expectation value of the <math altimg='si1.svg'><mfrac><mn>1</mn><mn>2</mn></mfrac></math> BPS circular Wilson loop in <math altimg='si2.svg'><mrow><mi mathvariant='script'>N</mi><mo linebreak='goodbreak'>=</mo><mn>4</mn></mrow></math> SYM theory is given in the planar limit by the famous Bessel function expression: <math altimg='si3.svg'><mrow><mrow><mo>&#9001;</mo><mi>W</mi><mo>&#9002;</mo></mrow><mo linebreak='goodbreak'>=</mo><mfrac><mrow><mn>2</mn><mi>N</mi></mrow><msqrt><mi>&#955;</mi></msqrt></mfrac><msub><mi>I</mi><mn>1</mn></msub><mrow><mo>(</mo><msqrt><mi>&#955;</mi></msqrt><mo>)</mo></mrow></mrow></math>. Expanded in large <italic>&#955;</italic> and expressed in terms of the AdS <inf>5</inf>&#8239;&#215;&#8239; <italic>S</italic> 5 string tension <math altimg='si4.svg'><mrow><mi>T</mi><mo linebreak='goodbreak'>=</mo><mfrac><msqrt><mi>&#955;</mi></msqrt><mrow><mn>2</mn><mi>&#960;</mi></mrow></mfrac></mrow></math> this gives <math altimg='si5.svg'><mrow><mrow><mo>&#9001;</mo><mi>W</mi><mo>&#9002;</mo></mrow><mo linebreak='goodbreak'>=</mo><mfrac><msqrt><mi>T</mi></msqrt><mrow><mn>2</mn><mi>&#960;</mi><msub><mi>g</mi><mi>s</mi></msub></mrow></mfrac><msup><mi>e</mi><mrow><mn>2</mn><mi>&#960;</mi><mi>T</mi></mrow></msup><mrow><mo>(</mo><mn>1</mn><mo linebreak='badbreak'>&#8722;</mo><mfrac><mn>3</mn><mrow><mn>16</mn><mi>&#960;</mi></mrow></mfrac><msup><mi>T</mi><mrow><mo>&#8722;</mo><mn>1</mn></mrow></msup><mo linebreak='badbreak'>+</mo><mo>&#8230;</mo><mo>)</mo></mrow></mrow></math>.The exponential is matched by the value of the action of the string with the AdS <inf>2</inf> world volume while the prefactor comes from the 1-loop GS string correction. Here we address the question of how the subleading <math altimg='si6.svg'><msup><mi>T</mi><mrow><mo>&#8722;</mo><mn>1</mn></mrow></msup></math> term could be reproduced by the 2-loop correction in the corresponding partition function of the AdS <inf>5</inf>&#8239;&#215;&#8239; <italic>S</italic> 5 GS string expanded near the AdS <inf>2</inf> minimal surface. We find that the string correction contains a non-zero UV logarithmic divergence implying that comparison with the SYM result requires a particular subtraction prescription. We discuss implications of this conclusion for checking the AdS/CFT duality at strong coupling.

M. Beccaria

S.A. Kurlyand

A.A. Tseytlin

Strong coupling expansion of <math altimg='si1.svg'><mfrac><mn>1</mn><mn>2</mn></mfrac></math> BPS Wilson loop in SYM theory and 2-loop Green-Schwarz string in AdS <inf>5</inf>&#8239;&#215;&#8239; <italic>S</italic> 5

We compute the potential-graviton contributions to the conservative scattering angle of two nonspinning bodies in maximal supergravity at fifth order in Newton’s constant, including second-order self-force effects. Our goal is to tackle the challenging integrals arising at this order in Einstein gravity, but within the technically simpler framework of supergravity. The calculation employs the scattering-amplitude framework, effective field theory, and multiloop integration techniques based on integration by parts and differential equations. The final result is expressed as a series expansion around the static limit, thereby avoiding the explicit evaluation of intricate special functions. This series solution for the master integrals applies, as well, to the corresponding computation in general relativity. Remarkably, we observe nontrivial cancellations among contributions associated with Calabi-Yau integrals, alongside a distinct contribution governed by a Heun differential equation.

Zvi Bern

Enrico Herrmann

Radu Roiban

Michael S. Ruf

Alexander V. Smirnov

Vladimir A. Smirnov

Mao Zeng

Second-Order Self-Force Potential-Region Binary Dynamics at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="script">O</mi><mo stretchy="false">(</mo><msup><mrow><mi>G</mi></mrow><mrow><mn>5</mn></mrow></msup><mo stretchy="false">)</mo></mrow></math> in Supergravity

We update the analysis of the viability of the lepton mixing patterns originating from <italic>A</italic> <inf>4</inf>, <italic>S</italic> <inf>4</inf> and <italic>A</italic> <inf>5</inf> discrete flavour symmetries and leading to predictions for the solar neutrino mixing angle, <italic>&#952;</italic> <inf>12</inf>. We perform a statistical analysis using as an input (i) the results of the latest global fit to neutrino oscillation data, and (ii) the first JUNO measurement of sin&#8201; 2 <italic>&#952;</italic> <inf>12</inf>. Out of the five (four) cases compatible with the global data at 3 <italic>&#963;</italic> for normal (inverted) neutrino mass ordering, only three (two) cases remain compatible with the global data at the same confidence level after taking into account the JUNO result.

Japan

S.T. Petcov

A.V. Titov

Viability of <italic>A</italic> <inf>4</inf>, <italic>S</italic> <inf>4</inf> and <italic>A</italic> <inf>5</inf> flavour symmetries in light of the first JUNO result

We perform a high-statistics lattice QCD calculation of the low-energy two-nucleon scattering amplitudes. To address discrepancies in the literature, the calculation is performed at a heavy pion mass in the limit that the light quark masses are equal to the physical strange quark mass, <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>m</mi><mi>π</mi></msub><mo>=</mo><msub><mi>m</mi><mi>K</mi></msub><mo>≃</mo><mn>714</mn><mspace width="0.28em"></mspace><mi>MeV</mi></mrow></math>. Using a state-of-the-art momentum space method, we rule out the presence of a bound di-nucleon in both the isospin 0 (deuteron) and 1 (di-neutron) channels, in contrast with many previous results that made use of compact hexaquark creation operators. To diagnose the discrepancy, we add such hexaquark interpolating operators to our basis and find that they do not affect the determination of the two-nucleon finite-volume spectrum, and thus they do not couple to deeply bound di-nucleons that are missed by the momentum-space operators. Furthermore, we perform a high-statistics calculation of the HAL QCD potential on the same gauge ensembles and find qualitative agreement with our main results. We conclude that di-nucleons do not form bound states at heavy pion masses and that previous identification of deeply bound di-nucleons must have arisen from a misidentification of the spectrum from off-diagonal elements of a correlation function.

John Bulava

M.A. Clark

Arjun S. Gambhir

Andrew D. Hanlon

Ben Hörz

Bálint Joó

Christopher Körber

Ken McElvain

Aaron S. Meyer

Henry Monge-Camacho

Colin Morningstar

Joseph Moscoso

Amy Nicholson

Fernando Romero-López

Ermal Rrapaj

Andrea Shindler

Sarah Skinner

Pavlos M. Vranas

André Walker-Loud

Di-nucleons do not form bound states at heavy pion mass

We present a systematic functional approach to calculating symmetry-restoring counterterms in Effective Field Theories (EFTs) regulated using the Breitenlohner-Maison-’t Hooft-Veltman (BMHV) scheme. Building on a recently developed method that employs auxiliary spurion fields, our approach automates the extraction of these counterterms directly from the one-loop effective action, offering a streamlined and efficient procedure. We demonstrate its efficacy by applying it to the Standard Model Effective Field Theory (SMEFT) at dimension six, providing the first complete determination of its symmetry-restoring counterterms in the BMHV scheme. Our work establishes a robust foundation for consistent one-loop matching and two-loop running computations in EFTs with chiral gauge symmetries.

Spain

Javier Fuentes-Martín

Adrián Moreno-Sánchez

Anders Thomsen

Symmetry restoration in the SMEFT: finite counterterms for a non-anticommuting gamma-5