Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV

CMS Collaboration

doi:10.1140/epjc/s10052-024-13244-0

Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV

CMS Collaboration

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CERN
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2 引用（Scopus）

摘要

A search is reported for charge-parity CP violation in D0→KS0KS0 decays, using data collected in proton–proton collisions at s=13TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6fb-1, which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D∗+→D0π+ and D∗-→D¯0π-. The CP asymmetry in D0→KS0KS0 is measured to be ACP(KS0KS0)=(6.2±3.0±0.2±0.8)%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the CP asymmetry in the D0→KS0π+π- decay. This is the first CP asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.

源语言	英语
文章编号	1264
期刊	European Physical Journal C
卷	84
期	12
DOI	https://doi.org/10.1140/epjc/s10052-024-13244-0
出版状态	已出版 - 12月 2024

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10.1140/epjc/s10052-024-13244-0

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@article{56f8ede494904da6b9810a002bff5b1c,

title = "Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV",

abstract = "A search is reported for charge-parity CP violation in D0→KS0KS0 decays, using data collected in proton–proton collisions at s=13TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6fb-1, which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D∗+→D0π+ and D∗-→D¯0π-. The CP asymmetry in D0→KS0KS0 is measured to be ACP(KS0KS0)=(6.2±3.0±0.2±0.8)\%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the CP asymmetry in the D0→KS0π+π- decay. This is the first CP asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.",

author = "CMS Collaboration and A. Zhokin and I. Zhizhin and A. Zarubin and Yuldashev, \{B. S.\} and N. Voytishin and A. Vorobyev and A. Uzunian and L. Uvarov and A. Tulupov and A. Toropin and I. Tlisova and O. Teryaev and A. Terkulov and V. Sulimov and D. Sosnov and A. Snigirev and V. Smirnov and S. Slabospitskii and Y. Skovpen and S. Shulha and S. Shmatov and V. Shalaev and V. Sergeychik and V. Savrin and M. Savina and O. Radchenko and V. Popov and S. Polikarpov and S. Petrushanko and V. Perelygin and V. Palichik and V. Oreshkin and S. Obraztsov and A. Nikitenko and V. Murzin and V. Matveev and A. Malakhov and V. Makarenko and N. Lychkovskaya and P. Levchenko and A. Lanev and N. Krasnikov and A. Kozyrev and V. Korenkov and D. Konstantinov and O. Kodolova and V. Klyukhin and M. Kirsanov and D. Kirpichnikov and T. Cheng",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = dec,

doi = "10.1140/epjc/s10052-024-13244-0",

language = "英语",

volume = "84",

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T1 - Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV

AU - CMS Collaboration

AU - Zhokin, A.

AU - Zhizhin, I.

AU - Zarubin, A.

AU - Yuldashev, B. S.

AU - Voytishin, N.

AU - Vorobyev, A.

AU - Uzunian, A.

AU - Uvarov, L.

AU - Tulupov, A.

AU - Toropin, A.

AU - Tlisova, I.

AU - Teryaev, O.

AU - Terkulov, A.

AU - Sulimov, V.

AU - Sosnov, D.

AU - Snigirev, A.

AU - Smirnov, V.

AU - Slabospitskii, S.

AU - Skovpen, Y.

AU - Shulha, S.

AU - Shmatov, S.

AU - Shalaev, V.

AU - Sergeychik, V.

AU - Savrin, V.

AU - Savina, M.

AU - Radchenko, O.

AU - Popov, V.

AU - Polikarpov, S.

AU - Petrushanko, S.

AU - Perelygin, V.

AU - Palichik, V.

AU - Oreshkin, V.

AU - Obraztsov, S.

AU - Nikitenko, A.

AU - Murzin, V.

AU - Matveev, V.

AU - Malakhov, A.

AU - Makarenko, V.

AU - Lychkovskaya, N.

AU - Levchenko, P.

AU - Lanev, A.

AU - Krasnikov, N.

AU - Kozyrev, A.

AU - Korenkov, V.

AU - Konstantinov, D.

AU - Kodolova, O.

AU - Klyukhin, V.

AU - Kirsanov, M.

AU - Kirpichnikov, D.

AU - Cheng, T.

PY - 2024/12

Y1 - 2024/12

N2 - A search is reported for charge-parity CP violation in D0→KS0KS0 decays, using data collected in proton–proton collisions at s=13TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6fb-1, which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D∗+→D0π+ and D∗-→D¯0π-. The CP asymmetry in D0→KS0KS0 is measured to be ACP(KS0KS0)=(6.2±3.0±0.2±0.8)%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the CP asymmetry in the D0→KS0π+π- decay. This is the first CP asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.

AB - A search is reported for charge-parity CP violation in D0→KS0KS0 decays, using data collected in proton–proton collisions at s=13TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6fb-1, which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D∗+→D0π+ and D∗-→D¯0π-. The CP asymmetry in D0→KS0KS0 is measured to be ACP(KS0KS0)=(6.2±3.0±0.2±0.8)%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the CP asymmetry in the D0→KS0π+π- decay. This is the first CP asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.

UR - https://www.scopus.com/pages/publications/105011738017

U2 - 10.1140/epjc/s10052-024-13244-0

DO - 10.1140/epjc/s10052-024-13244-0

M3 - 文章

AN - SCOPUS:105011738017

SN - 1434-6044

VL - 84

JO - European Physical Journal C

JF - European Physical Journal C

IS - 12

M1 - 1264

ER -

Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV

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