Measurement of CP Violation in the Decay B plus → K+ π0

被引：9

作者：

Aaij, R. ^{[33
]}

Beteta, C. Abellan ^{[51
]}

Ackernley, T. ^{[61
]}

Adeva, B. ^{[47
]}

Adinolfi, M. ^{[55
]}

Afsharnia, H. ^{[9
]}

Aidala, C. A. ^{[69
,87
]}

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
]}

Amhis, Y. ^{[11
]}

An, L. ^{[49
]}

Anderlini, L. ^{[22
]}

Andreianov, A. ^{[39
]}

Andreotti, M. ^{[21
]}

Andrews, J. E. ^{[67
]}

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
]}

Baker, S. ^{[62
]}

Baladron Rodriguez, P. ^{[47
]}

Balagura, V ^{[12
]}

Baldini, W. ^{[21
,49
]}

Leite, J. Baptista ^{[1
]}

Barlow, R. J. ^{[63
]}

Barsuk, S. ^{[11
]}

Barter, W. ^{[62
]}

Bartolini, M. ^{[24
,88
]}

Baryshnikov, F. ^{[42
,83
]}

Basels, J. M. ^{[14
]}

Bassi, G. ^{[30
]}

Batsukh, B. ^{[69
]}

Battig, A. ^{[15
]}

Bay, A. ^{[50
]}

Becker, M. ^{[15
]}

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, Univ Grenoble Alpes, CNRS, IN2P3,LAPP, Annecy, France

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

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

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

[12] Lab Leprince Ringuet Llr, Palaiseau, France

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

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 09期

基金：

英国科学技术设施理事会;

关键词：

PUZZLE;

D O I：

10.1103/PhysRevLett.126.091802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A measurement of CP violation in the decay B+ -> K+pi(0) is reported using data corresponding to an integrated luminosity of 5.4 fb- 1 collected with the LHCb experiment at a center-of-mass energy of root s = 13 TeV. The CP asymmetry is measured to be 0.025 +/- 0.015 +/- 0.006 +/- 0.003, where the uncertainties are statistical, systematic, and due to an external input. This is the most precise measurement of this quantity. It confirms and significantly enhances the observed anomalous difference between the direct CP asymmetries of the B-0 -> K+pi(-) and B+ -> K+pi 0 decays, known as the K pi puzzle.

引用

页数：11

共 40 条

[1]

Aaij R, 2020, J HIGH ENERGY PHYS, DOI 10.1007/JHEP06(2020)058

[2] LHCb detector performance [J].

Aaij, R. ;

Adeva, B. ;

Adinolfi, M. ;

Affolder, A. ;

Ajaltouni, Z. ;

Akar, S. ;

Albrecht, J. ;

Alessio, F. ;

Alexander, M. ;

Ali, S. ;

Alkhazov, G. ;

Alvarez Cartelle, P. ;

Alves, A. A., Jr. ;

Amato, S. ;

Amerio, S. ;

Amhis, Y. ;

An, L. ;

Anderlini, L. ;

Anderson, J. ;

Andreassen, R. ;

Andreotti, M. ;

Andrews, J. E. ;

Appleby, R. B. ;

Gutierrez, O. Aquines ;

Archilli, F. ;

Artamonov, A. ;

Artuso, M. ;

Aslanides, E. ;

Auriemma, G. ;

Baalouch, M. ;

Bachmann, S. ;

Back, J. J. ;

Badalov, A. ;

Baesso, C. ;

Baldini, W. ;

Barlow, R. J. ;

Barschel, C. ;

Barsuk, S. ;

Barter, W. ;

Batozskaya, V. ;

Battista, V. ;

Bay, A. ;

Beaucourt, L. ;

Beddow, J. ;

Bedeschi, F. ;

Bediaga, I. ;

Belogurov, S. ;

Belous, K. ;

Belyaev, I. ;

Ben-Haim, E. .

INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 2015, 30 (07)

[3] Branching fraction and CP asymmetry of the decays B+ → KS0π+ and B+ → KS0K+ [J].

Aaij, R. ;

Adeva, B. ;

Adinolfi, M. ;

Adrover, C. ;

Affolder, A. ;

Ajaltouni, Z. ;

Albrecht, J. ;

Alessio, E. ;

Alexander, M. ;

Ali, S. ;

Alkhazov, G. ;

Cartelle, P. Alvarez ;

Alves, A. A., Jr. ;

Amato, S. ;

Amerio, S. ;

Amhis, Y. ;

Anderlini, L. ;

Anderson, J. ;

Andreassen, R. ;

Andrews, J. E. ;

Appleby, R. B. ;

Gutierrez, O. Aquines ;

Archilli, E. ;

Artamonov, A. ;

Artuso, M. ;

Aslanides, E. ;

Auriemma, G. ;

Baalouch, M. ;

Bachmann, S. ;

Back, J. J. ;

Baesso, C. ;

Balagura, V. ;

Baldini, W. ;

Barlow, R. J. ;

Barsche, C. ;

Barsuk, S. ;

Barter, W. ;

Bauer, Th. ;

Bay, A. ;

Beddow, J. ;

Bedeschi, F. ;

Bediaga, I. ;

Belogurov, S. ;

Belous, K. ;

Belyaev, I. ;

Ben-Haim, E. ;

Bencivenni, G. ;

Benson, S. ;

Benton, J. ;

Berezhnoy, A. .

PHYSICS LETTERS B, 2013, 726 (4-5) :646-655

[4] The LHCb trigger and its performance in 2011 [J].

Aaij, R. ;

Albrecht, J. ;

Alessio, F. ;

Amato, S. ;

Aslanides, E. ;

Belyaev, I. ;

van Beuzekom, M. ;

Bonaccorsi, E. ;

Bonnefoy, R. ;

Brarda, L. ;

Callot, O. ;

Cattaneo, M. ;

Chanal, H. ;

Chebbi, M. ;

Cid Vidal, X. ;

Clemencic, M. ;

Closier, J. ;

Coco, V. ;

Cogan, J. ;

Deschamps, O. ;

Dijkstra, H. ;

Drancourt, C. ;

Dzhelyadin, R. ;

Frank, M. ;

Gandelman, M. ;

Gaspar, C. ;

Gligorov, V. V. ;

Goebel, C. ;

Cardoso, L. A. Granado ;

Guz, Yu. ;

Haen, C. ;

He, J. ;

van Herwijnen, E. ;

Hulsbergen, W. ;

Jacobsson, R. ;

Jost, B. ;

Karbach, T. M. ;

Kerzel, U. ;

Koppenburg, P. ;

Krocker, G. ;

Langenbruch, C. ;

Lax, I. ;

Le Gac, R. ;

Lefevre, R. ;

Lefranccois, J. ;

Leroy, O. ;

Gioi, L. Li ;

Liu, G. ;

Machefert, F. ;

Machikhiliyan, I. V. .

JOURNAL OF INSTRUMENTATION, 2013, 8

[5] Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons [J].

Aaltonen, T. ;

Amerio, S. ;

Amidei, D. ;

Anastassov, A. ;

Annovi, A. ;

Antos, J. ;

Apollinari, G. ;

Appel, J. A. ;

Arisawa, T. ;

Artikov, A. ;

Asaadi, J. ;

Ashmanskas, W. ;

Auerbach, B. ;

Aurisano, A. ;

Azfar, F. ;

Badgett, W. ;

Bae, T. ;

Barbaro-Galtieri, A. ;

Barnes, V. E. ;

Barnett, B. A. ;

Barria, P. ;

Bartos, P. ;

Bauce, M. ;

Bedeschi, F. ;

Behari, S. ;

Bellettini, G. ;

Bellinger, J. ;

Benjamin, D. ;

Beretvas, A. ;

Bhatti, A. ;

Bland, K. R. ;

Blumenfeld, B. ;

Bocci, A. ;

Bodek, A. ;

Bortoletto, D. ;

Boudreau, J. ;

Boveia, A. ;

Brigliadori, L. ;

Bromberg, C. ;

Brucken, E. ;

Budagov, J. ;

Budd, H. S. ;

Burkett, K. ;

Busetto, G. ;

Bussey, P. ;

Butti, P. ;

Buzatu, A. ;

Calamba, A. ;

Camarda, S. ;

Campanelli, M. .

PHYSICAL REVIEW LETTERS, 2014, 113 (24)

[6] RELATIONSHIP BETWEEN VARIABLE SELECTION AND DATA AUGMENTATION AND A METHOD FOR PREDICTION [J].

ALLEN, DM .

TECHNOMETRICS, 1974, 16 (01) :125-127

[7] Geant4 developments and applications [J].

Allison, J ;

Amako, K ;

Apostolakis, J ;

Araujo, H ;

Dubois, PA ;

Asai, M ;

Barrand, G ;

Capra, R ;

Chauvie, S ;

Chytracek, R ;

Cirrone, GAP ;

Cooperman, G ;

Cosmo, G ;

Cuttone, G ;

Daquino, GG ;

Donszelmann, M ;

Dressel, M ;

Folger, G ;

Foppiano, F ;

Generowicz, J ;

Grichine, V ;

Guatelli, S ;

Gumplinger, P ;

Heikkinen, A ;

Hrivnacova, I ;

Howard, A ;

Incerti, S ;

Ivanchenko, V ;

Johnson, T ;

Jones, F ;

Koi, T ;

Kokoulin, R ;

Kossov, M ;

Kurashige, H ;

Lara, V ;

Larsson, S ;

Lei, F ;

Link, O ;

Longo, F ;

Maire, M ;

Mantero, A ;

Mascialino, B ;

McLaren, I ;

Lorenzo, PM ;

Minamimoto, K ;

Murakami, K ;

Nieminen, P ;

Pandola, L ;

Parlati, S ;

Peralta, L .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2006, 53 (01) :270-278

[8]

Alves Jr A. A., 2008, J INSTRUM, V3

[9]

Amhis Y., AVERAGES B HADRON C

[10]

Anderlini L, 2016, Report No. LHCbPUB-2016-021

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