Using the pinch technique, we determine the one-loop vertices of weak interactions in the B-LSSM and incorporate their pinch contributions into the gauge boson self-energies. Compared to the definitions of the $\textit{S}$, $\textit{T}$, and $\textit{U}$ parameters in the Standard Model based on the $S U(2)_L \otimes U(1)_Y$ group, the corresponding parameters in the local B-L gauge symmetry (B-LSSM) are modified. We present these redefined $\textit{S}$, $\textit{T}$, and $\textit{U}$ parameters and demonstrate the convergence of the results. In the framework of the low-energy effective Lagrangian for weak interactions, the $\textit{S}$, $\textit{T}$, and $\textit{U}$ parameters can be expressed as functions of specific parameters in the B-LSSM. The updated experimental and fitting results strongly constrain the parameter space of the B-LSSM.

China

Sheng-Kai Cui

Ke-Sheng Sun

Yu-Li Yan

Jin-Lei Yang

Tai-Fu Feng

$\textit{S}$, $\textit{T}$, $\textit{U}$ parameters in the B-LSSM * Supported by the Natural Science Foundation of Guangxi Autonomous Region (2022GXNSFDA035068), the Natural Science Foundation of Hebei Province (A2022104001), and the Foundation of Baoding University (2023Z01)

<p>We present the first measurements of the forward and midrapidity <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>η</mi></math>-meson cross sections from <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mo>+</mo><mi>p</mi></math> collisions at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>500</mn></math> and 510 GeV, respectively. We also report the midrapidity <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>η</mi><mo>/</mo><msup><mi>π</mi><mn>0</mn></msup></math> ratio at 510 GeV. The forward cross section is measured differentially in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>η</mi></math>-meson transverse momentum (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>p</mi><mi>T</mi></msub></math>) from 1.0 to <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mn>6.5</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi><mo>/</mo><mi>c</mi></mrow></math> for pseudorapidity <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>3.0</mn><mo>&lt;</mo><mo stretchy="false">|</mo><mi>η</mi><mo stretchy="false">|</mo><mo>&lt;</mo><mn>3.8</mn></math>. The midrapidity cross section is measured from 3.5 to <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mn>44</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi><mo>/</mo><mi>c</mi></mrow></math> for pseudorapidity <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo stretchy="false">|</mo><mi>η</mi><mo stretchy="false">|</mo><mo>&lt;</mo><mn>0.35</mn></math>. Both cross sections serve as critical inputs to an updated global analysis of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>η</mi></math>-meson fragmentation functions.</p>

Hungary

N.J. Abdulameer

United States

U. Acharya

A. Adare

C. Aidala

N.N. Ajitanand

Japan

Y. Akiba

R. Akimoto

H. Al-Ta’ani

J. Alexander

M. Alfred

D. Anderson

K.R. Andrews

A. Angerami

Russia

S. Antsupov

K. Aoki

N. Apadula

E. Appelt

Y. Aramaki

R. Armendariz

H. Asano

E.C. Aschenauer

E.T. Atomssa

T.C. Awes

B. Azmoun

V. Babintsev

M. Bai

N.S. Bandara

B. Bannier

E. Bannikov

K.N. Barish

B. Bassalleck

A.T. Basye

S. Bathe

V. Baublis

Germany

C. Baumann

A. Bazilevsky

M. Beaumier

S. Beckman

R. Belmont

J. Ben-Benjamin

R. Bennett

A. Berdnikov

Y. Berdnikov

L. Bichon

D. Black

B. Blankenship

D.S. Blau

South Korea

J.S. Bok

V. Borisov

K. Boyle

M.L. Brooks

D. Broxmeyer

J. Bryslawskyj

H. Buesching

V. Bumazhnov

G. Bunce

S. Butsyk

S. Campbell

P. Castera

P. Chaitanya

C.H. Chen

D. Chen

C.Y. Chi

C. Chiu

M. Chiu

I.J. Choi

J.B. Choi

India

R.K. Choudhury

Sweden

P. Christiansen

T. Chujo

O. Chvala

V. Cianciolo

Israel

Z. Citron

B.A. Cole

France

Z. Conesa del Valle

M. Connors

R. Corliss

M. Csanád

T. Csörgő

L. D’Orazio

S. Dairaku

A. Datta

M.S. Daugherity

G. David

M.K. Dayananda

K. DeBlasio

K. Dehmelt

A. Denisov

A. Deshpande

E.J. Desmond

K.V. Dharmawardane

Brazil

O. Dietzsch

L. Ding

A. Dion

M. Donadelli

V. Doomra

J.H. Do

O. Drapier

A. Drees

Cross sections of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>η</mi></math> mesons in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mo>+</mo><mi>p</mi></math> collisions at forward rapidity at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>500</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi></math> and central rapidity at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>510</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi></math>

$$s\rightarrow u$$ weak decays of heavy flavor hadrons play a unique role in the field of heavy flavor physics. In this work, we investigate semileptonic $$s\rightarrow u$$ decays of singly heavy baryons in the light-front approach under the three-quark picture. Firstly, we provide all the form factors using this quark model, in particular for $$f_{3}$$ and $$g_{3}$$ , which are usually considered non-extractable in recent literature. We also discuss the heavy quark limit for the form factors, and some of our results differ from those in the literature. We find that, when considering the heavy quark limit, the $$m_{s}$$ correction may not be negligible. Secondly, we apply the obtained form factors to predict some observables in semileptonic decays. It is worth noting that, due to the extremely small phase space, lepton flavor universality (LFU) is sensitive to the masses of leptons, and precise measurement of LFU is expected to be an important tool for testing the standard model.

Yi-Peng Xing

Xiao-Qian Jiang

Zhen-Xing Zhao

Semileptonic $$s\rightarrow u$$ decays of singly heavy baryons

<p>Using <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mo stretchy="false">(</mo><mn>2259.3</mn><mo>±</mo><mn>11.1</mn><mo stretchy="false">)</mo><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>6</mn></mrow></msup></mrow></math> <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo></math> events acquired with the BESIII detector, the branching fraction of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo><mo stretchy="false">→</mo><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>−</mo></msup></math> is measured with improved precision to be <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi mathvariant="script">B</mi><mrow><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo><mo stretchy="false">→</mo><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>−</mo></msup></mrow></msub><mo>=</mo><mo stretchy="false">(</mo><mn>3.240</mn><mo>±</mo><mn>0.023</mn><mo>±</mo><mn>0.081</mn><mo stretchy="false">)</mo><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>3</mn></mrow></msup></math>, where the first and second uncertainties are statistical and systematic, respectively, which is consistent with the world average value within 1 standard deviation. This value, along with those for the branching fractions of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo></math> decaying into <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>μ</mi><mo>+</mo></msup><msup><mi>μ</mi><mo>−</mo></msup></math>, is in good agreement with the relation predicted by the sequential lepton hypothesis. Combining the branching fraction values with the leptonic width of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo></math>, the total width of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo></math> is determined to be <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mo stretchy="false">(</mo><mn>287</mn><mo>±</mo><mn>9</mn><mo stretchy="false">)</mo><mtext> </mtext><mtext> </mtext><mi>keV</mi></mrow></math>.</p>

M. Ablikim

M.N. Achasov

P. Adlarson

O. Afedulidis

X.C. Ai

R. Aliberti

Italy

A. Amoroso

Y. Bai

JINR

O. Bakina

I. Balossino

Y. Ban

H.R. Bao

Poland

V. Batozskaya

Mongolia

K. Begzsuren

N. Berger

M. Berlowski

M. Bertani

D. Bettoni

F. Bianchi

E. Bianco

A. Bortone

I. Boyko

R.A. Briere

A. Brueggemann

H. Cai

X. Cai

A. Calcaterra

G.F. Cao

N. Cao

Türkiye

S.A. Cetin

X.Y. Chai

J.F. Chang

G.R. Che

Y.Z. Che

G. Chelkov

C. Chen

Chao Chen

G. Chen

H.S. Chen

H.Y. Chen

M.L. Chen

S.J. Chen

S.L. Chen

S.M. Chen

T. Chen

X.R. Chen

X.T. Chen

Y.B. Chen

Y.Q. Chen

Z.J. Chen

S.K. Choi

G. Cibinetto

F. Cossio

J.J. Cui

H.L. Dai

J.P. Dai

A. Dbeyssi

R.E. de Boer

D. Dedovich

C.Q. Deng

Z.Y. Deng

A. Denig

I. Denysenko

M. Destefanis

F. De Mori

B. Ding

X.X. Ding

Y. Ding

J. Dong

L.Y. Dong

Precision measurement of the branching fraction for the decay <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ψ</mi><mo stretchy="false">(</mo><mn>2</mn><mi>S</mi><mo stretchy="false">)</mo><mo stretchy="false">→</mo><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>−</mo></msup></math>