Measurement of the Time-Integrated CP Asymmetry in D0 → K-K+ Decays

被引：0

作者：

Aaij, R. ^{[33
]}

Abdelmotteleb, A. S. W. ^{[51
]}

Beteta, C. Abellan ^{[45
]}

Abudinen, F. ^{[51
]}

Ackernley, T. ^{[55
]}

Adeva, B. ^{[41
]}

Adinolfi, M. ^{[49
]}

Adlarson, P. ^{[78
]}

Afsharnia, H. ^{[9
]}

Agapopoulou, C. ^{[13
]}

Aidala, C. A. ^{[79
]}

Ajaltouni, Z. ^{[9
]}

Akar, S. ^{[60
]}

Akiba, K. ^{[33
]}

Albicocco, P. ^{[23
]}

Albrecht, J. ^{[15
]}

Alessio, F. ^{[43
]}

Alexander, M. ^{[54
]}

Albero, A. Alfonso ^{[40
]}

Aliouche, Z. ^{[57
]}

Cartelle, P. Alvarez ^{[50
]}

Amalric, R. ^{[13
]}

Amato, S. ^{[2
]}

Amey, J. L. ^{[49
]}

Amhis, Y. ^{[11
,43
]}

An, L. ^{[43
]}

Anderlini, L. ^{[22
]}

Andersson, M. ^{[45
]}

Andreianov, A. ^{[39
]}

Andreotti, M. ^{[21
]}

Andreou, D. ^{[63
]}

Ao, D. ^{[6
]}

Archilli, F. ^{[17
]}

Artamonov, A. ^{[39
]}

Artuso, M. ^{[63
]}

Aslanides, E. ^{[10
]}

Atzeni, M. ^{[45
]}

Audurier, B. ^{[12
]}

Perea, I. B. Bachiller ^{[8
]}

Bachmann, S. ^{[17
]}

Bachmayer, M. ^{[44
]}

Back, J. J. ^{[51
]}

Bailly-reyre, A. ^{[13
]}

Rodriguez, P. Baladron ^{[41
]}

Balagura, V. ^{[12
]}

Baldini, W. ^{[21
,43
]}

Leite, J. Baptista de Souza ^{[1
]}

Barbetti, M. ^{[22
,90
]}

Barlow, R. J. ^{[57
]}

Barsuk, S. ^{[11
]}

机构：

[1] CBPF, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil

[3] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China

[4] Inst High Energy Phys, Beijing, Peoples R China

[5] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[6] Univ Chinese Acad Sci, Beijing, Peoples R China

[7] Cent China Normal Univ, Inst Particle Phys, Wuhan, Hubei, Peoples R China

[8] Univ Savoie Mt Blanc, CNRS, IN2P3, LAPP, Annecy, France

[9] Univ Clermont Auvergne, LPC, CNRS, IN2P3, Clermont Ferrand, France

[10] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France

[11] Univ Paris Saclay, IJCLab, CNRS, IN2P3, Orsay, France

[12] Ecole Polytech, Inst Polytech Paris, Lab Leprince Ringuet, CNRS,IN2P3, Palaiseau, France

[13] Sorbonne Univ, LPNHE, Paris Diderot Sorbonne Paris Cite, CNRS,IN2P3, Paris, France

[14] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[15] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[16] Max Planck Inst Kernphys, Heidelberg, Germany

[17] Heidelberg Univ, Phys Inst, Heidelberg, Germany

[18] Univ Coll Dublin, Sch Phys, Dublin, Ireland

[19] INFN, Sez Bari, Bari, Italy

[20] INFN, Sez Bologna, Bologna, Italy

[21] INFN, Sez Ferrara, Ferrara, Italy

[22] INFN, Sez Firenze, Florence, Italy

[23] INFN, Lab Nazl Frascati, Frascati, Italy

[24] INFN, Sez Genova, Genoa, Italy

[25] INFN, Sez Milano, Milan, Italy

[26] INFN, Sez Milano Bicocca, Milan, Italy

[27] INFN, Sez Cagliari, Monserrato, Italy

[28] Univ Padua, Padua, Italy

[29] INFN, Padua, Italy

[30] INFN, Sez Pisa, Pisa, Italy

[31] INFN, Sez Roma La Sapienza, Rome, Italy

[32] INFN, Sez Roma Tor Vergata, Rome, Italy

[33] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[34] Vrije Univ Amsterdam, Amsterdam, Netherlands

[35] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland

[36] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[37] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[38] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[39] CERN, Geneva, Switzerland

[40] Univ Barcelona, ICCUB, Barcelona, Spain

[41] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

[42] Univ Valencia, Ctr Mixto, Inst Fis Corpuscular, CSIC, Valencia, Spain

[43] European Org Nucl Res CERN, Geneva, Switzerland

[44] Ecole Polytech Fed Lausanne, Inst Phys, Lausanne, Switzerland

[45] Univ Zurich, Phys Inst, Zurich, Switzerland

[46] NSC Kharkiv Inst Phys & Technol NSC KIPT, Kharkiv, Ukraine

[47] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[48] Univ Birmingham, Birmingham, W Midlands, England

[49] Univ Bristol, HH Wills Phys Lab, Bristol, Avon, England

[50] Univ Cambridge, Cavendish Lab, Cambridge, England

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 09期

关键词：

VIOLATION; SEARCH; REGENERATION; AMPLITUDE; B-S(0); B-0;

D O I：

10.1103/physRevLett.131.091802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The time-integrated CP asymmetry in the Cabibbo suppressed decay PKK is measured using proton proton collision data, corresponding to an integrated luminosity of 5.7 th collected at a center of mass energy of 13 TeV with the LHCb detector. The D mesons are required to originate from promptly produced DD's decays, and the charge of the companion pion is used to determine the flavor of the charm meson at production. The time integrated CP asymmetry is measured to be Acr(KK) 6,815.41.6 x 10 where the first uncertainty is statistical and the second systematic. The direct CP asymmetries in D-K-K and D -> decays, and are derived by combining Ace(KK) with the time integrated CP asymmetry differ ence, AAcr-Acr(KK)-A(x), and other inputs, giving a (7.715.7) x 10, (23.2 16.1) x 10, with a correlation coefficient corresponding to p=0.88. The compatibility of these results with CP symmetry is 1.4 and 3.8 standard deviations for DKK and D degrees-xx decays, respectively. This is the first evidence for direct CP violation in a specific Do decay.

引用

页数：13

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