Measurement of the time-integrated CP asymmetry in D 0 → KS                        0 KS                        0 decays

LHCb Collaboration; R. Aaij

doi:10.1007/JHEP11(2018)048

Measurement of the time-integrated CP asymmetry in D ⁰ → K_S ⁰ K_S ⁰ decays

LHCb Collaboration, R. Aaij

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

155 Downloads (Pure)

Abstract

A measurement of the time-integrated CP asymmetry in D⁰ → K_S ⁰K_S ⁰ decays is reported. The data correspond to an integrated luminosity of about 2 fb⁻¹ collected in 2015–2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D⁰ candidate is required to originate from a D^*+ → D⁰π⁺ decay, allowing the determination of the flavour of the D⁰ meson using the pion charge. The D⁰ → K⁺K⁻ decay, which has a well measured CP asymmetry, is used as a calibration channel. The CP asymmetryfor D⁰ → K_S ⁰K_S ⁰ is measured to beACP(D0→KS0KS0)=(4.3±3.4±1.0)%,where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtainACP(D0→KS0KS0)=(2.3±2.8±0.9)%.[Figure not available: see fulltext.].

Original language	English
Article number	48
Number of pages	19
Journal	Journal of High Energy Physics
Volume	2018
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2018)048
Publication status	Published - 8 Nov 2018

Keywords

Charm physics
CP violation
Flavor physics
Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP11(2018)048Licence: Creative Commons: Attribution (CC BY)

R_Aaij_et_al_Measurement_of_the_time_integrated_CP_asymmetry_Journal_of_High_Energy_Physics_2018
Checked for eligibility: 11/01/2018
Final published version, 598 KBLicence: Creative Commons: Attribution (CC BY)

Cite this

@article{2977669cc3444695b501aeef894703c0,

title = "Measurement of the time-integrated CP asymmetry in D 0 → KS 0 KS 0 decays",

abstract = "A measurement of the time-integrated CP asymmetry in D0 → KS 0KS 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015–2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate from a D*+ → D0π+ decay, allowing the determination of the flavour of the D0 meson using the pion charge. The D0 → K+K− decay, which has a well measured CP asymmetry, is used as a calibration channel. The CP asymmetryfor D0 → KS 0KS 0 is measured to beACP(D0→KS0KS0)=(4.3±3.4±1.0)%,where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtainACP(D0→KS0KS0)=(2.3±2.8±0.9)%.[Figure not available: see fulltext.].",

keywords = "Charm physics, CP violation, Flavor physics, Hadron-Hadron scattering (experiments)",

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and F. Archilli and P. d{\textquoteright}Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Farley and P. Ilten and C. Lazzeroni and A. Mazurov and J. Plews and D. Popov and A. Sergi and Watson, {N. K.} and T. Williams and Zarebski, {K. A.}",

year = "2018",

month = nov,

day = "8",

doi = "10.1007/JHEP11(2018)048",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "11",

}

TY - JOUR

T1 - Measurement of the time-integrated CP asymmetry in D 0 → KS 0 KS 0 decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Archilli, F.

AU - d’Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Ilten, P.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Watson, N. K.

AU - Williams, T.

AU - Zarebski, K. A.

PY - 2018/11/8

Y1 - 2018/11/8

N2 - A measurement of the time-integrated CP asymmetry in D0 → KS 0KS 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015–2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate from a D*+ → D0π+ decay, allowing the determination of the flavour of the D0 meson using the pion charge. The D0 → K+K− decay, which has a well measured CP asymmetry, is used as a calibration channel. The CP asymmetryfor D0 → KS 0KS 0 is measured to beACP(D0→KS0KS0)=(4.3±3.4±1.0)%,where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtainACP(D0→KS0KS0)=(2.3±2.8±0.9)%.[Figure not available: see fulltext.].

AB - A measurement of the time-integrated CP asymmetry in D0 → KS 0KS 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015–2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate from a D*+ → D0π+ decay, allowing the determination of the flavour of the D0 meson using the pion charge. The D0 → K+K− decay, which has a well measured CP asymmetry, is used as a calibration channel. The CP asymmetryfor D0 → KS 0KS 0 is measured to beACP(D0→KS0KS0)=(4.3±3.4±1.0)%,where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtainACP(D0→KS0KS0)=(2.3±2.8±0.9)%.[Figure not available: see fulltext.].

KW - Charm physics

KW - CP violation

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

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U2 - 10.1007/JHEP11(2018)048

DO - 10.1007/JHEP11(2018)048

M3 - Article

AN - SCOPUS:85056665770

SN - 1126-6708

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 11

M1 - 48

ER -

Measurement of the time-integrated CP asymmetry in D 0 → KS 0 KS 0 decays