We investigate the buildup of elliptic flow of charm quarks produced in the early pre-equilibrium stage of high-energy proton-nucleus collisions. The initial stage is modeled within the color glass condensate framework as an evolving glasma, initialized through the McLerran-Venugopalan model. Subnucleonic fluctuations have been implemented as constituent-quark hotspots for both the proton and the nuclear participants. Charm quarks are propagated in the evolving non-Abelian background by solving the relativistic Wong equations for their coordinates, momenta, and color charges. First, we compute the nuclear modification factor of charm quarks, finding a slight migration towards higher <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>p</mi><mi>T</mi></msub></math> states in agreement with previous results in the literature. Then, we focus on the azimuthal anisotropies acquired through the interaction with glasma fields. We find that glasma-induced momentum anisotropies are efficiently transmitted to heavy quarks within <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>τ</mi><mo>∼</mo><mn>0.4</mn><mtext> </mtext><mtext> </mtext><mrow><mi>fm</mi><mo>/</mo><mi mathvariant="normal">c</mi></mrow></math>, leading to a sizeable charm-quark <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>v</mi><mn>2</mn></msub></math>, with a magnitude that increases with the strength of the initial fields and with the number of nuclear participants. Remarkably, we show that the early stage contribution alone can account for a significant fraction of the experimentally observed <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>J</mi><mo>/</mo><mi>ψ</mi></math> elliptic flow in p-Pb collisions, indicating that prehydrodynamic dynamics can play a non-negligible role in the final-state heavy-flavor collectivity, especially in small systems.

Italy

Gabriele Parisi

France

Fabrizio Murgana

Vincenzo Greco

Marco Ruggieri

Elliptic flow of charm quarks produced in the early stage of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mi>A</mi></math> collisions

The production of heavy quarks (charm and beauty) in high-energy hadronic and nuclear collisions provides an excellent testing ground for the theory of strong interactions and validates models based on quantum chromodynamics (QCD). In this work, prompt and nonprompt production of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="normal">J</mi><mo>/</mo></mrow><mi>ψ</mi></math> in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><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>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math> are studied as a function of the transverse spherocity using pythia8. <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="normal">J</mi><mo>/</mo></mrow><mi>ψ</mi></math> is reconstructed via its electromagnetic decay to dielectrons and dimuons, in mid- and forward rapidity, respectively. Transverse spherocity, an event-shape observable, is used to distinguish hard-QCD events from the softer, isotropic ones. In pythia8, the production of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="normal">J</mi><mo>/</mo></mrow><mi>ψ</mi></math> can be influenced by the average number of multiple parton interactions (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo stretchy="false">⟨</mo><msub><mi>N</mi><mrow><mi>mpi</mi></mrow></msub><mo stretchy="false">⟩</mo></math>), owing to the underlying events, which have a dominant contribution to particle production at lower transverse momentum. Since transverse spherocity is correlated to <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo stretchy="false">⟨</mo><msub><mi>N</mi><mrow><mi>mpi</mi></mrow></msub><mo stretchy="false">⟩</mo></math>, this can serve as an experimentally accessible tool for event selection to study the underlying QCD processes influencing the prompt and nonprompt <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathvariant="normal">J</mi><mo>/</mo></mrow><mi>ψ</mi></math> production. This study reveals the correlation between heavy-flavor production dynamics and topological event selection in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mi>p</mi></math> collisions using pythia8, whose relevance awaits experimental validation.

India

Aswathy Menon Kavumpadikkal Radhakrishnan

Suraj Prasad

Finland

Neelkamal Mallick

Raghunath Sahoo

Topological production of charmonia with event-shape engineering in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><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>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math> using pythia8

The reduced cross section of the semiexclusive <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo stretchy="false">(</mo><mi>l</mi><mo>,</mo><msup><mi>l</mi><mo>′</mo></msup><mi>p</mi><mo stretchy="false">)</mo></math> lepton scattering process irrespective of the type of interaction is determined mainly by the bound nucleon momentum distribution in the target and nucleon final state interaction with the residual nucleus. These cross sections can be identified with distorted nuclear spectral functions and therefore, they are similar up to Coulomb corrections for neutrino and electron scattering on nuclei. In this article, we exploit this similarity and use data with precise kinematics and large statistics for semiexclusive electron scattering on an oxygen target to test models employed in the genie neutrino event generator. We find that these models cannot reproduce well the measured reduced cross sections in all allowed kinematic regions and the genie event generator needs to describe better both the nuclear ground states and nucleon final state interaction. The approach presented in this paper provides a great opportunity to better test the accuracy of nuclear models of quasielastic neutrino-nucleus scattering, employed in neutrino event generators.

Russia

A.V. Butkevich

S.V. Luchuk

Test of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi mathsize="small">G</mi><mi mathsize="small">E</mi><mi mathsize="small">N</mi><mi mathsize="small">I</mi><mi mathsize="small">E</mi></mrow></math> neutrino event generator against reduced cross sections extracted from <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mrow><mmultiscripts><mrow><mi mathvariant="normal">O</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>16</mn></mrow></mmultiscripts></mrow><mo stretchy="false">(</mo><mi>e</mi><mo>,</mo><msup><mrow><mi>e</mi></mrow><mrow><mo>′</mo></mrow></msup><mi>p</mi><mo stretchy="false">)</mo></mrow></math> data

Using <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mrow><mo>(</mo><mn>1.0087</mn><mo>±</mo><mn>0.0044</mn><mo>)</mo></mrow><mo>×</mo><msup><mn>10</mn><mn>10</mn></msup></mrow><mo> </mo><mrow><mi>J</mi><mo>/</mo><mi>ψ</mi></mrow></math> events collected with the BESIII detector at the BEPCII storage ring, the reactions <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><mi>n</mi><mo>→</mo><mi mathvariant="normal">Λ</mi><mi>p</mi></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><mi>n</mi><mo>→</mo><msup><mi mathvariant="normal">Σ</mi><mn>0</mn></msup><mi>p</mi></mrow></math> are studied, where the <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup></math> baryon is produced in the process <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>J</mi><mo>/</mo><mi>ψ</mi><mo>→</mo><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><msup><mover accent="true"><mi mathvariant="normal">Σ</mi><mo>¯</mo></mover><mo>−</mo></msup></mrow></math> and the neutron is a component of the <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Be</mi><mprescripts></mprescripts><none></none><mn>9</mn></mmultiscripts><mo>,</mo><mo> </mo><mmultiscripts><mi mathvariant="normal">C</mi><mprescripts></mprescripts><none></none><mn>12</mn></mmultiscripts></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Au</mi><mprescripts></mprescripts><none></none><mn>197</mn></mmultiscripts></math> nuclei in the beam pipe. Clear signals of these two reactions are observed for the first time. Their cross sections are measured to be <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>σ</mi><mrow><mo>(</mo><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><mo>+</mo><mmultiscripts><mi>Be</mi><mprescripts></mprescripts><none></none><mn>9</mn></mmultiscripts><mo>→</mo><mi mathvariant="normal">Λ</mi><mo>+</mo><mi>p</mi><mo>+</mo><mi>X</mi><mo>)</mo></mrow><mo>=</mo><mrow><mo>(</mo><mn>45.2</mn><mo>±</mo><mn>12</mn><mo>.</mo><msub><mn>1</mn><mi>stat</mi></msub><mo>±</mo><mn>7</mn><mo>.</mo><msub><mn>2</mn><mi>sys</mi></msub><mo>)</mo></mrow></mrow></math> mb and <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>σ</mi><mrow><mo>(</mo><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><mo>+</mo><mmultiscripts><mi>Be</mi><mprescripts></mprescripts><none></none><mn>9</mn></mmultiscripts><mo>→</mo><msup><mi mathvariant="normal">Σ</mi><mn>0</mn></msup><mo>+</mo><mi>p</mi><mo>+</mo><mi>X</mi><mo>)</mo></mrow><mo>=</mo><mrow><mo>(</mo><mn>29.8</mn><mo>±</mo><mn>9</mn><mo>.</mo><msub><mn>7</mn><mi>stat</mi></msub><mo>±</mo><mn>6</mn><mo>.</mo><msub><mn>9</mn><mi>sys</mi></msub><mo>)</mo></mrow></mrow></math> mb for a <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup></math> average momentum of <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mn>0.992</mn><mspace width="0.28em"></mspace><mi>GeV</mi><mo>/</mo><mi>c</mi></mrow></math>, within a range of <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mo>±</mo><mn>0.015</mn><mspace width="0.28em"></mspace><mi>GeV</mi><mo>/</mo><mi>c</mi></mrow></math>, where <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>X</mi></math> represents the residual nucleus. This is the first study of <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup></math>-nucleon scattering at an electron-positron collider. The measured results serve as a significant element in enhancing the comprehensive understanding of hyperon-nucleon interactions, and also constitute an important factor in resolving the “hyperon puzzle” of neutron stars.

China

M. Ablikim

M.N. Achasov

Sweden

P. Adlarson

X.C. Ai

Germany

R. Aliberti

A. Amoroso

Q. An

Y. Bai

JINR

O. Bakina

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

United States

R.A. Briere

A. Brueggemann

H. Cai

M.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

C.H. 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

Z.K. Chen

South Korea

S.K. Choi

X. Chu

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

Y.X. Ding

J. Dong

L.Y. Dong

M.Y. Dong

X. Dong

M.C. Du

S.X. Du

Y.Y. Duan

Z.H. Duan

P. Egorov

G.F. Fan

J.J. Fan

Y.H. Fan

J. Fang

S.S. Fang

W.X. Fang

Y.Q. Fang

R. Farinelli

L. Fava

F. Feldbauer

G. Felici

C.Q. Feng

J.H. Feng

Y.T. Feng

M. Fritsch

C.D. Fu

J.L. Fu

First measurement of <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><mi>n</mi><mo>→</mo><mi mathvariant="normal">Λ</mi><mi>p</mi></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup><mi>n</mi><mo>→</mo><msup><mi mathvariant="normal">Σ</mi><mn>0</mn></msup><mi>p</mi></mrow></math> cross sections via <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">Σ</mi><mo>+</mo></msup></math>-nucleus scattering at an electron-positron collider

We utilize the universality of pion-pion (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>π</mi><mi>π</mi></math>) final-state interactions at small invariant masses to understand the enhanced localized <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>C</mi><mi>P</mi></mrow></math> violation in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>±</mo></msup><mo stretchy="false">→</mo><msup><mi>K</mi><mo>±</mo></msup><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup></math>, using a dispersive approach. From a fit to the integrated <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>C</mi><mi>P</mi></mrow></math>-asymmetry data, we successfully predict the Dalitz-plot kinematic distribution of the asymmetry in the low-energy <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>π</mi><mi>π</mi></math> region, including the large localized <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>C</mi><mi>P</mi></mrow></math> violation recently observed by LHCb. An essential role is played by the contributions of isospin 2. This formalism, whose parameters have a physical meaning, can be adapted straightforwardly to other systems with <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>C</mi><mi>P</mi></mrow></math> violation enhanced by final-state interactions.

L.A. Heuser

Spain

A. Reyes-Torrecilla

C. Hanhart

B. Kubis

Brazil

P.C. Magalhães

T. Mannel

J.R. Peláez

Understanding Large Localized <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>C</mi><mi>P</mi></math> Violation in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>B</mi><mo>±</mo></msup><mo stretchy="false">→</mo><msup><mi>K</mi><mo>±</mo></msup><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup></math> Using Dispersive Methods

Topology plays a central role in classifying solitonic configurations in field theories, providing robustness and a nonperturbative label, the so-called topological charge <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Q</mi></math>. In soliton-fermion coupled systems, the relation between the topological charge and the number of zero modes is well established through the index theorem. However, the physical consequences of the sign of the topological charge have remained largely unexplored. In this work, we study fermions in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>2</mn><mo>+</mo><mn>1</mn></math> dimensions coupled to skyrmions with target space <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="double-struck">C</mi><msup><mi mathvariant="normal">P</mi><mi>N</mi></msup></math>, particularly focusing on the backreactions of the fermions and on the sign of the topological charge. We obtain the solutions in a self-consistent manner, which exhibit an asymmetry with respect to the topological charge <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo>±</mo><mi>Q</mi></math> especially in the strong coupling regimes. This asymmetry is caused by the fermionic eigenvalue problem inherent in the self-consistent formulation. Although the Lagrangian is symmetric under <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Q</mi><mo stretchy="false">→</mo><mo>−</mo><mi>Q</mi></math>, the coupled equations for the skyrmions and anti-skyrmions become inequivalent once fermionic backreaction is taken into account. We demonstrate the mechanism in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="double-struck">C</mi><msup><mi mathvariant="normal">P</mi><mn>1</mn></msup></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="double-struck">C</mi><msup><mi mathvariant="normal">P</mi><mn>2</mn></msup></math> skyrmions, but the analysis is directly extendable for the general <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="double-struck">C</mi><msup><mi mathvariant="normal">P</mi><mi>N</mi></msup></math>.

Japan

Yuki Amari

Nobuyuki Sawado

Shintaro Yamamoto

Topological charge asymmetry in a <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="double-struck">C</mi><msup><mi mathvariant="normal">P</mi><mi>N</mi></msup></math> skyrmion-fermion coupled system

As a strong candidate for new physics beyond the Standard Model, the exotic charged gauge boson <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>W</mi><mo>′</mo></msup></math> has attracted extensive research interest. In this work, we investigate the interactions of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>W</mi><mo>′</mo></msup></math> boson at the electron-proton colliders. The process <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>e</mi><mo>−</mo></msup><mi>u</mi><mo stretchy="false">→</mo><msub><mi>ν</mi><mi>e</mi></msub><mi>d</mi></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>e</mi><mo>−</mo></msup><mi>u</mi><mo stretchy="false">→</mo><msup><mi>e</mi><mo>±</mo></msup><mi>j</mi><mi>j</mi><mi>j</mi></math> with <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>t</mi></math>-channel <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>W</mi><mo>′</mo></msup></math> exchange are studied. The polarization of the initial-state electrons has a significant impact on the cross section of the studied process, while the angular distribution of the final-state leptons serves as an important observable for the interactions of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>W</mi><mo>′</mo></msup></math> boson. In some specific regions of the parameter space, the detectable mass range for the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>W</mi><mo>′</mo></msup></math> boson can reach around 10 TeV, and the coupling strength can achieve a precision of approximately 1% relative to the interaction strength of the Standard Model. Especially, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>e</mi><mo>−</mo></msup><mi>u</mi><mo stretchy="false">→</mo><msup><mi>e</mi><mo>+</mo></msup><mi>j</mi><mi>j</mi><mi>j</mi></math> process is forbidden within the Standard Model, which would constitute important evidence in the search for the left-right symmetric model.

Xinyi Yan

Honglei Li

Zhi-Long Han

Fei Huang

Ruiyu Xing

Study the property of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>W</mi><mo>′</mo></msup></math> at future <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>e</mi><mo>−</mo></msup><mi>p</mi></math> collider

Xuan-Heng Zhang

Sheng-Qi Zhang

Cong-Feng Qiao

Erratum: The spectra of $$p\bar{\Lambda }$$ and $$p\bar{\Sigma }$$ hexaquark states

We measure the time- and phase-space-integrated <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>C</mi><mi>P</mi></math> asymmetry <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi mathvariant="script">A</mi><mrow><mi>C</mi><mi>P</mi></mrow></msub></math> in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>D</mi><mn>0</mn></msup><mo stretchy="false">→</mo><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msup><mi>π</mi><mn>0</mn></msup></math> decays reconstructed in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup></mrow><mo stretchy="false">→</mo><mrow><mi>c</mi><mover accent="true"><mi>c</mi><mo stretchy="false">¯</mo></mover></mrow></math> events collected by the Belle II experiment from 2019 to 2022. This sample corresponds to an integrated luminosity of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>428</mn><mtext> </mtext><mtext> </mtext><msup><mi>fb</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math>. We require <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>D</mi><mn>0</mn></msup></math> mesons to be produced in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>D</mi><mrow><mo>*</mo><mo>+</mo></mrow></msup><mo stretchy="false">→</mo><msup><mi>D</mi><mn>0</mn></msup><msup><mi>π</mi><mo>+</mo></msup></math> decays to determine their flavor at production. Control samples of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>D</mi><mn>0</mn></msup><mo stretchy="false">→</mo><msup><mi>K</mi><mo>−</mo></msup><msup><mi>π</mi><mo>+</mo></msup></math> decays are used to correct for reconstruction-induced asymmetries. The result, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="script">A</mi></mrow><mrow><mi>C</mi><mi>P</mi></mrow></msub><mo stretchy="false">(</mo><mrow><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow><mo stretchy="false">)</mo><mo>=</mo><mspace linebreak="goodbreak"></mspace><mo stretchy="false">(</mo><mn>0.29</mn><mo>±</mo><mn>0.27</mn><mo>±</mo><mn>0.13</mn><mo stretchy="false">)</mo><mo>%</mo></mrow></math>, where the first uncertainty is statistical and the second systematic, is the most precise result to date and is consistent with <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>C</mi><mi>P</mi></math> conservation.

M. Abumusabh

I. Adachi

L. Aggarwal

H. Ahmed

Y. Ahn

H. Aihara

N. Akopov

S. Alghamdi

M. Alhakami

A. Aloisio

N. Althubiti

K. Amos

N. Anh Ky

D.M. Asner

H. Atmacan

T. Aushev

R. Ayad

V. Babu

H. Bae

N.K. Baghel

S. Bahinipati

P. Bambade

Sw. Banerjee

M. Barrett

M. Bartl

J. Baudot

A. Beaubien

F. Becherer

J. Becker

J.V. Bennett

F.U. Bernlochner

V. Bertacchi

M. Bertemes

E. Bertholet

M. Bessner

S. Bettarini

V. Bhardwaj

B. Bhuyan

T. Bilka

D. Biswas

A. Bobrov

D. Bodrov

Measurement of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>C</mi><mi>P</mi></math> asymmetry in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>D</mi><mn>0</mn></msup><mo stretchy="false">→</mo><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msup><mi>π</mi><mn>0</mn></msup></math> decays at Belle II