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

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Title: Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV.
Authors: CMS Collaboration (AUTHOR), Hayrapetyan, A.1 (AUTHOR), Tumasyan, A.1,2 (AUTHOR), Adam, W.3 (AUTHOR), Andrejkovic, J. W.3 (AUTHOR), Bergauer, T.3 (AUTHOR), Chatterjee, S.3,4 (AUTHOR), Damanakis, K.3 (AUTHOR), Dragicevic, M.3 (AUTHOR), Hussain, P. S.3 (AUTHOR), Jeitler, M.3,5 (AUTHOR), Krammer, N.3 (AUTHOR), Li, A.3 (AUTHOR), Liko, D.3 (AUTHOR), Mikulec, I.3 (AUTHOR), Schieck, J.3,5 (AUTHOR), Schöfbeck, R.3 (AUTHOR), Schwarz, D.3 (AUTHOR), Sonawane, M.3 (AUTHOR), Templ, S.3 (AUTHOR)
Source: European Physical Journal C -- Particles & Fields. Dec2024, Vol. 84 Issue 12, p1-26. 26p.
Subjects: CP violation, Hadron decay, Mesons, Hadrons, Pions, Proton-proton interactions
Abstract: A search is reported for charge-parity CP violation in D 0 → K S 0 K S 0 decays, using data collected in proton–proton collisions at s = 13 Te V recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6 fb - 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 ∗ + → D 0 π + and D ∗ - → D ¯ 0 π - . The CP asymmetry in D 0 → K S 0 K S 0 is measured to be A CP (K S 0 K S 0) = (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 D 0 → K S 0 π + 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. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV.
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  Data: <searchLink fieldCode="AR" term="%22CMS Collaboration%22">CMS Collaboration</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hayrapetyan%2C+A%2E%22">Hayrapetyan, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tumasyan%2C+A%2E%22">Tumasyan, A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adam%2C+W%2E%22">Adam, W.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Andrejkovic%2C+J%2E+W%2E%22">Andrejkovic, J. W.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bergauer%2C+T%2E%22">Bergauer, T.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chatterjee%2C+S%2E%22">Chatterjee, S.</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Damanakis%2C+K%2E%22">Damanakis, K.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dragicevic%2C+M%2E%22">Dragicevic, M.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hussain%2C+P%2E+S%2E%22">Hussain, P. S.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jeitler%2C+M%2E%22">Jeitler, M.</searchLink><relatesTo>3,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Krammer%2C+N%2E%22">Krammer, N.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+A%2E%22">Li, A.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liko%2C+D%2E%22">Liko, D.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mikulec%2C+I%2E%22">Mikulec, I.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schieck%2C+J%2E%22">Schieck, J.</searchLink><relatesTo>3,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schöfbeck%2C+R%2E%22">Schöfbeck, R.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schwarz%2C+D%2E%22">Schwarz, D.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sonawane%2C+M%2E%22">Sonawane, M.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Templ%2C+S%2E%22">Templ, S.</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. Dec2024, Vol. 84 Issue 12, p1-26. 26p.
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  Data: <searchLink fieldCode="DE" term="%22CP+violation%22">CP violation</searchLink><br /><searchLink fieldCode="DE" term="%22Hadron+decay%22">Hadron decay</searchLink><br /><searchLink fieldCode="DE" term="%22Mesons%22">Mesons</searchLink><br /><searchLink fieldCode="DE" term="%22Hadrons%22">Hadrons</searchLink><br /><searchLink fieldCode="DE" term="%22Pions%22">Pions</searchLink><br /><searchLink fieldCode="DE" term="%22Proton-proton+interactions%22">Proton-proton interactions</searchLink>
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  Data: A search is reported for charge-parity CP violation in D 0 → K S 0 K S 0 decays, using data collected in proton–proton collisions at s = 13 Te V recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6 fb - 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 ∗ + → D 0 π + and D ∗ - → D ¯ 0 π - . The CP asymmetry in D 0 → K S 0 K S 0 is measured to be A CP (K S 0 K S 0) = (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 D 0 → K S 0 π + 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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