We study the light asymptotic limit of the one-point torus conformal block in $\textit{A}$ Toda field theory. Through the AGT correspondence, this problem can be translated into the computation of the instanton partition function of four-dimensional $$ \mathcal{N} $$ = 2 U($\textit{n}$) supersymmetric Yang-Mills theory, which we then examine in the limit $\textit{b}$ → 0 at fixed conformal dimensions. We show that, in this regime, the instanton sum simplifies drastically: for each Young diagram, only boxes with specific arm lengths contribute to the bifundamental factors. Exploiting this property, we derive an explicit representation for the light one-point torus $\textit{W}$ conformal block valid for arbitrary $\textit{n}$ ≥ 2.

Armenia

Armen Poghosyan

Hasmik Poghosyan

The $\textit{W}$ $\textit{n}$ light one-point torus conformal block

<p>A search is performed for a new resonance <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>X</mi></math> decaying into a Higgs boson and a new scalar boson <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Y</mi></math> (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi><mi>Y</mi></math>) including the case where <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Y</mi></math> is assumed to be a second Higgs boson (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi><mi>H</mi></math>), using proton-proton collision data collected at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math>, corresponding to an integrated luminosity of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>138</mn><mtext> </mtext><mtext> </mtext><msup><mi>fb</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math>. This study performs a comprehensive exploitation of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>b</mi><mi>b</mi><mi>Z</mi><mi>Z</mi></math> events, encompassing the following decay topologies. One <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi></math> candidate is identified through its decay into a bottom quark-antiquark pair, while the other <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi></math> or the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Y</mi></math> candidate is selected through its decay into a pair of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi></math> bosons. One <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi></math> boson is required to decay leptonically and the other, to decay into a pair of quarks or neutrinos. Events of interest are categorized based on the Lorentz boosts of the hadronically decaying <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi></math> bosons. Machine-learning-based discriminants, together with the reconstructed resonance mass, are employed across the different categories to separate signal from backgrounds, and their corresponding distributions are included in a simultaneous fit. No significant deviations from the standard model predictions are observed. Upper limits at the 95% confidence level are set on the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi><mi>Y</mi></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi><mi>H</mi></math> production cross sections. For <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi><mi>Y</mi></math> production, the upper limit on the cross section of the process <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mi>p</mi><mo stretchy="false">→</mo><mi>X</mi><mo stretchy="false">→</mo><mrow><mi>H</mi><mi>Y</mi></mrow><mo stretchy="false">→</mo><mi>b</mi><mi>b</mi><mi>Z</mi><mi>Z</mi></math> ranges from 500 to 5 fb, with the most stringent constraints achieved for high-mass <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>X</mi></math> resonances and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Y</mi></math> masses near the threshold for decay into a pair of massive vector bosons. This is comparable to the sensitivity achieved in other analyses, which focus on <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi></math> decays to <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>γ</mi><mi>γ</mi></math> or <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>τ</mi><mi>τ</mi></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Y</mi></math> decays into a pair of bottom quarks or massive vector bosons. For resonant <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>H</mi><mi>H</mi></math> production, the upper limit on the cross section of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mi>p</mi><mo stretchy="false">→</mo><mi>X</mi><mo stretchy="false">→</mo><mrow><mi>H</mi><mi>H</mi></mrow></math> production is 1 pb for a high-mass resonance.</p>

A. Hayrapetyan

V. Makarenko

A. Tumasyan

Austria

W. Adam

L. Benato

T. Bergauer

M. Dragicevic

P.S. Hussain

M. Jeitler

N. Krammer

A. Li

D. Liko

M. Matthewman

J. Schieck

R. Schöfbeck

M. Shooshtari

M. Sonawane

N. Van Den Bossche

W. Waltenberger

C.E. Wulz

Belgium

T. Janssen

H. Kwon

D. Ocampo Henao

T. Van Laer

P. Van Mechelen

D. Ahmadi

J. Bierkens

N. Breugelmans

J. D’Hondt

S. Dansana

A. De Moor

M. Delcourt

C. Gupta

F. Heyen

Y. Hong

P. Kashko

S. Lowette

I. Makarenko

S. Nandakumar

S. Tavernier

M. Tytgat

G.P. Van Onsem

S. Van Putte

D. Vannerom

A. Beshr

B. Bilin

F. Caviglia Roman

B. Clerbaux

A.K. Das

I. De Bruyn

G. De Lentdecker

E. Ducarme

H. Evard

L. Favart

A. Khalilzadeh

A. Malara

M.A. Shahzad

A. Sharma

L. Thomas

M. Vanden Bemden

C. Vander Velde

P. Vanlaer

F. Zhang

A. Cauwels

M. De Coen

D. Dobur

C. Giordano

G. Gokbulut

K. Kaspar

D. Kavtaradze

D. Marckx

K. Skovpen

A.M. Tomaru

J. van der Linden

J. Vandenbroeck

H. Aarup Petersen

S. Bein

A. Benecke

A. Bethani

G. Bruno

A. Cappati

J. De Favereau De Jeneret

C. Delaere

F. Gameiro Casalinho

A. Giammanco

A.O. Guzel

V. Lemaitre

J. Lidrych

P. Malek

S. Turkcapar

Brazil

G.A. Alves

M. Barroso Ferreira Filho

E. Coelho

C. Hensel

D. Matos Figueiredo

T. Menezes De Oliveira

C. Mora Herrera

P. Rebello Teles

M. Soeiro

E.J. Tonelli Manganote

Search for a new resonance decaying to a Higgs boson and a scalar boson in events with two <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>b</mi></math> jets and two <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi></math> bosons in proton-proton collisions at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math>

Double parton scattering (DPS) corresponds to events where two parton-parton scatterings occur in a single hadron-hadron collision. The DPS effects may arise from the spectator scatterings that are somewhat related to semi-hard QCD activities. In this work, we investigate the DPS effects on the $\textit{W}$ -boson mass measurements. Especially, our analysis reveals that the DPS effects contribute additional missing transverse momenta from spectator scatterings as well as relevant inclusive cross sections, potentially altering the distribution of total missing transverse momenta. Consequently, the DPS effects have the potential to cause an increase in the measured $\textit{W}$ -boson mass by the CDF detector, which helps to understand the deviation of the CDF-II measurements from other measurements and the predicted value in the Standard Model. This could be further validated in upcoming studies, such as the $\textit{W}$ -like analyses of the $\textit{Z}$ boson production, which will potentially open new avenues for probing QCD dynamics in the semi-hard regime.

China

Rui Zhang

Zhen Zhang

Double parton scattering effects on the measurement of the $\textit{W}$ -boson mass

A search is presented for massive narrow-width resonances in the mass range of 1–4.5 $$\,\text {Te\hspace{-.08em}V}$$ , decaying into pairs of Higgs bosons (HH). The search uses proton–proton collision data at a center-of-mass energy of 13 $$\,\text {Te\hspace{-.08em}V}$$ collected with the CMS detector at the CERN LHC during 2016–2018, corresponding to an integrated luminosity of 138 $$\,\text {fb}^{-1}$$ . The analysis targets final states where one Higgs boson decays into a pair of bottom quarks and the other into a pair of tau leptons, $$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\,\tau ^{+}\tau ^{-}$$ . It uses a single large radius jet to reconstruct the $$\text {H}\rightarrow \text {b}\bar{\text {b}}$$ decay, while the $$\text {H}\rightarrow \tau ^{+}\tau ^{-}$$ decay products can either be contained within a single large radius jet or appear as two isolated tau leptons. The observed data are consistent with standard model background expectations. Upper limits at 95% confidence level are set on the production cross section for resonant HHproduction for masses between 1 and 4.5 $$\,\text {Te\hspace{-.08em}V}$$ . This analysis sets the most sensitive limits to date on $$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\, \tau ^{+}\tau ^{-}$$ decays in the mass range of 1.4–4.5 $$\,\text {Te\hspace{-.08em}V}$$ .

P. Hussain

T. Laer

P. Mechelen

A. Moor

D. Müller

G. Onsem

S. Putte

A. Das

I. Bruyn

G. Lentdecker

P. Gianneios

F. Khan

M. Shahzad

M. Coen

A. Tomaru

N. Bossche

J. Linden

J. Jeneret

A. Guzel

P. Mastrapasqua

G. Alves

T. Oliveira

E. Tonelli Manganote

A. Vilela Pereira

W. Aldá Júnior

H. Brandao Malbouisson

Search for heavy resonances decaying into two Higgs bosons in the $${\text {b}}\bar{\textrm{b}}\tau ^{+}\tau ^{-}$$ final state in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te\hspace{-.08em}V}$$

A search for Higgs boson (H) production at high transverse momentum ($\textit{p}$ ) in the WW decay channel is presented. The analysis uses proton-proton collisions at $$ \sqrt{s}=13 $$ TeV recorded by the CMS experiment in 2016–2018, corresponding to an integrated luminosity of 138 fb . The visible decay products of the Higgs boson are reconstructed as a single large-radius jet with one isolated lepton or none (1$\textit{ℓ}$ and 0$\textit{ℓ}$, respectively; $\textit{ℓ}$ = e, $\textit{μ}$). The H-candidate jets are identified using an advanced transformer-based algorithm and are calibrated with the Lund jet plane reweighting technique. The 1$\textit{ℓ}$ channel is further split into gluon fusion, vector boson fusion, and associated production with hadronically decaying vector boson categories, while the 0$\textit{ℓ}$ channel considers all production processes inclusively. The measured cross section times the H $\textit{→}$ WW branching fraction relative to the standard model expectation is $$ \mu =-{0.19}_{-0.46}^{+0.48} $$ , indicating no evidence of a signal above the background. This measurement represents the first dedicated study of highly Lorentz-boosted H $\textit{→}$ WW decays, complementing earlier searches for high-$\textit{p}$ Higgs boson in other decay channels.

T. Wybouw

M. Bemden

M. Gonçalves Sales

Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

Motivated by the recent observation of the pseudoscalar toponium $${\eta }_{t}$$ at the LHC and by the ongoing interest in its properties, we phenomenologically investigate the $${\eta }_{t}$$ $${\rightarrow }$$ $$W^{+}W^{-}$$ process, one of the characteristic decays of toponium $${\eta }_{t}$$ . The branching ratio for the $${\eta }_{t}$$ $${\rightarrow }$$ $$W^{+}W^{-}$$ decay is estimated with two scenarios of the decay constant $$f_{{\eta }_{t}}$$ . It is found that tens of dilepton events from the cascade decays, $${\eta }_{t}$$ $${\rightarrow }$$ $$W^{+}W^{-}$$ $${\rightarrow }$$ $${\ell }^{-}\bar{\nu }_{\ell }{\ell }^{{\prime }+}{\nu }_{{\ell }^{\prime }}$$ with $${\ell }$$ , $${\ell }^{\prime }$$ $$=$$ $\textit{e}$ and $${\mu }$$ , could be experimentally observed, when considering the realistic identification efficiency of the charged lepton and assuming more than $$3{\times }10^{7}$$ $${\eta }_{t}$$ events available at the future HL-LHC. We propose searching for $${\eta }_{t}$$ via the $${\eta }_{t}$$ $${\rightarrow }$$ $$W^{+}W^{-}$$ $${\rightarrow }$$ $${\ell }^{-}\bar{\nu }_{\ell }{\ell }^{{\prime }+}{\nu }_{{\ell }^{\prime }}$$ channel, which features no $\textit{b}$-jets and clean dilepton signatures, thus offering a complementary and potentially more sensitive probe.

Yueling Yang

Bingbing Yang

Junfeng Sun

Prospects for observing the $${\eta }_{t}$$ $${\rightarrow }$$ $$W^{+}W^{-}$$ decay at the HL-LHC

We study the ODE/IM correspondence for the ordinary differential equation associated with the affine Lie algebra $$ {E}_6^{(1)} $$ . The WKB expansion of the solution of the ODE is performed by the diagonalization method, and the period integrals of the WKB coefficients along the Pochhammer contour are calculated. We also compute the integrals of motion on a cylinder in two-dimensional conformal field theory with W-symmetry associated with $$ {E}_6^{(1)} $$ . Their eigenvalues on the highest-weight state are shown to agree with the period integrals up to the sixth order.

Japan

Daichi Ide

Katsushi Ito

Wataru Kono

Integrals of motion in $\textit{W E}$ 6 CFT and the ODE/IM correspondence

J. Andrejkovic

I. Mikulec

D. Schwarz

J. Song

J. Knolle

L. Lambrecht

L. Wezenbeek

Addendum: Search for resonant and nonresonant production of pairs of dijet resonances in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

A search for exotic Higgs boson decays H $\textit{→}$ 𝒜𝒜, with 𝒜 → γγ is presented, using events with a semi-merged topology. One of the hypothetical particles, 𝒜, is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other 𝒜 decays into two resolved photons. The search is performed using proton-proton collision data collected by the CMS experiment at $$ \sqrt{s}=13 $$ TeV, corresponding to an integrated luminosity of 138 fb . The data agree with the standard model background expectation. Upper limits are set on the product of the Higgs boson production cross section and the branching fraction, $\textit{σ}$(pp $\textit{→}$ H) ℬ(H $\textit{→}$ 𝒜𝒜 $\textit{→}$ 4γ), which range from 0.264 to 0.005 pb at 95% confidence level, for 𝒜 masses in the range 1 $\textit{< m}$ $\textit{<}$ 15 GeV. These limits are the most stringent to date in the 1–5 GeV $\textit{m}$ range.

Search for exotic Higgs boson decays H $\textit{→}$ 𝒜𝒜 with 𝒜 → γγ in events with a semi-merged topology in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

The production cross sections of the Υ(1S), Υ(2S), and Υ(3S) mesons are measured in proton-proton collisions at $$ \sqrt{s}=13.6 $$ TeV, using a data sample collected in 2022 by the CMS experiment and corresponding to an integrated luminosity of 37.4 fb . The measurement is performed in the μ μ decay channels, differentially as a function of transverse momentum in the 20–200 GeV range, in the |$\textit{y}$| $\textit{<}$ 0$\textit{.}$6 and 0$\textit{.}$6 $\textit{<}$ |$\textit{y}$| $\textit{<}$ 1$\textit{.}$2 rapidity intervals.

W. Carvalho

J. Chinellato

Measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections in pp collisions at $$ \sqrt{s}=13.6 $$ TeV