Measurement of the charm mixing parameter yCP-yCPKπ using two-body D0 meson decays

被引:15
作者
Aaij, R. [33 ]
Abdelmotteleb, A. S. W. [57 ]
Beteta, C. Abellan [51 ]
Abudinen, F. [57 ]
Ackernley, T. [61 ]
Adeva, B. [47 ]
Adinolfi, M. [55 ]
Afsharnia, H. [9 ]
Agapopoulou, C. [13 ]
Aidala, C. A. [69 ,89 ]
Aiola, S. [25 ]
Ajaltouni, Z. [9 ]
Akar, S. [66 ]
Albrecht, J. [15 ]
Alessio, F. [49 ]
Alexander, M. [60 ]
Alfonso Albero, A. [46 ]
Aliouche, Z. [63 ]
Alkhazov, G. [39 ]
Cartelle, P. Alvarez [56 ]
Amato, S. [2 ]
Amey, J. L. [55 ]
Amhis, Y. [11 ]
An, L. [49 ]
Anderlini, L. [22 ]
Andersson, M. [51 ]
Andreianov, A. [39 ]
Andreotti, M. [21 ]
Ao, D. [6 ]
Archilli, F. [17 ]
Artamonov, A. [45 ]
Artuso, M. [69 ]
Arzymatov, K. [43 ]
Aslanides, E. [10 ]
Atzeni, M. [51 ]
Audurier, B. [12 ]
Bachmann, S. [17 ]
Bachmayer, M. [50 ]
Back, J. J. [57 ]
Baladron Rodriguez, P. [47 ]
Balagura, V [12 ]
Baldini, W. [21 ]
de Souza Leite, J. Baptista [1 ]
Barbetti, M. [22 ,90 ]
Barlow, R. J. [63 ]
Barsuk, S. [11 ]
Barter, W. [62 ]
Bartolini, M. [56 ]
Baryshnikov, F. [42 ,84 ]
Basels, J. M. [14 ]
机构
[1] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil
[3] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China
[4] Inst High Energy Phys IHEP, 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, Lab Leprince Ringuet, Inst Polytech Paris, CNRS IN2P3, Palaiseau, France
[13] Sorbonne Univ, Paris Diderot Sorbonne Paris Cite, LPNHE, 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 MPIK, Heidelberg, Germany
[17] Heidelberg Univ, Phys Inst, Heidelberg, Germany
[18] Univ Coll Dublin, Sch Phys, Dublin, Ireland
[19] Ist Nazl Fis Nucl, Sez Bari, Bari, Italy
[20] Ist Nazl Fis Nucl, Sez Bologna, Bologna, Italy
[21] Ist Nazl Fis Nucl, Sez Ferrara, Ferrara, Italy
[22] Ist Nazl Fis Nucl, Sez Firenze, Florence, Italy
[23] Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy
[24] Ist Nazl Fis Nucl, Sez Genova, Genoa, Italy
[25] Ist Nazl Fis Nucl, Sez Milano, Milan, Italy
[26] Ist Nazl Fis Nucl, Sez Milano Bicocca, Milan, Italy
[27] Ist Nazl Fis Nucl, Sez Cagliari, Monserrato, Italy
[28] Univ Padua, Padua, Italy
[29] Ist Nazl Fis Nucl, Padua, Italy
[30] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy
[31] Ist Nazl Fis Nucl, Sez Roma La Sapienza, Rome, Italy
[32] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy
[33] Nikhef Natl Inst Subatom 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] NRC Kurchatov Inst PNPI NRC KI, Petersburg Nucl Phys Inst, Gatchina, Russia
[40] Russian Acad Sci INR RAS, Inst Nucl Res, Moscow, Russia
[41] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia
[42] NRC Kurchatov Inst ITEP NRC KI, Inst Theoret & Expt Phys, Moscow, Russia
[43] Yandex Sch Data Anal, Moscow, Russia
[44] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia
[45] NRC Kurchatov Inst IHEP NRC KI, Inst High Energy Phys, Protvino, Russia
[46] Univ Barcelona, ICCUB, Barcelona, Spain
[47] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, Santiago De Compostela, Spain
[48] Ctr Mixto Univ Valencia CSIC, Inst Fis Corpuscular, Valencia, Spain
[49] European Org Nucl Res CERN, Geneva, Switzerland
[50] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland
关键词
D O I
10.1103/PhysRevD.105.092013
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A measurement of the ratios of the effective decay widths of D-0 -> pi(-)pi(+) and D-0 -> K- K+ decays over that of D-0 -> K-pi(+) decays is performed with the LHCb experiment using proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb(-1). These observables give access to the charm mixing parameters y(CP)(pi pi) - y(CP)(K pi )and y(CP)(KK) -y(CP)(K pi), and are measured as y(CP)(pi pi) - y(CP)(K pi) = (6.57 +/- 0.53 +/- 0.16) x 10(-3), y(CP)(KK) - y(CP)(K pi) = (7.08 +/- 0.30 +/- 0.14) x 10(-3), where the first uncertainties are statistical and the second systematic. The combination of the two measurements is Y-CP - y(CP)(K pi) = (6.96 +/- 0.26 +/- 0.13) x 10(-3), which is four times more precise than the previous world average.
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页数:17
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