Measurement of CP violation and the Bs0 meson decay width difference with Bs0→J/ψK+K- and Bs0→J/ψπ +π - Decays

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, I. Burducea, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, H. Carranza-Mejia, L. Carson, K. Carvalho Akiba, G. Casse

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

The time-dependent CP asymmetry in Bs0→J/ψK+K - decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector. The decay-time distribution is characterized by the decay widths ΓL and ΓH of the light and heavy mass eigenstates of the Bs0-B̄s0 system and by a CP-violating phase s. In a sample of 27 617 Bs0→J/ψK+K- decays, where the dominant contribution comes from Bs0→J/ψ decays, these parameters are measured to be s=0.07±0.09(stat) ±0.01(syst) rad, Γs≡(ΓL+Γ H)/2=0.663±0.005(stat)±0.006(syst) ps-1, and ΔΓs≡ΓL-ΓH=0. 100±0.016(stat)±0.003(syst) ps-1, corresponding to the single most precise determination of s, ΔΓs, and Γs. The result of performing a combined analysis with Bs0→J/ψπ+π- decays gives s=0.01±0.07(stat)±0.01(syst) rad, Γs= 0.661±0.004(stat)±0.006(syst) ps-1, and ΔΓs=0.106±0.011(stat)±0.007(syst) ps -1. All measurements are in agreement with the Standard Model predictions. © 2013 CERN. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
DOIs
Publication statusPublished - 21 Jun 2013
Externally publishedYes

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CP violation
mesons
decay
eigenvectors
luminosity
asymmetry
collisions
detectors
predictions

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Aaij, R. ; Abellan Beteta, C. ; Adeva, B. ; Adinolfi, M. ; Adrover, C. ; Affolder, A. ; Ajaltouni, Z. ; Albrecht, J. ; Alessio, F. ; Alexander, M. ; Ali, S. ; Alkhazov, G. ; Alvarez Cartelle, P. ; Alves, A. A. ; Amato, S. ; Amerio, S. ; Amhis, Y. ; Anderlini, L. ; Anderson, J. ; Andreassen, R. ; Appleby, R. B. ; Aquines Gutierrez, O. ; Archilli, F. ; Artamonov, A. ; Artuso, M. ; Aslanides, E. ; Auriemma, G. ; Bachmann, S. ; Back, J. J. ; Baesso, C. ; Balagura, V. ; Baldini, W. ; Barlow, R. J. ; Barschel, C. ; Barsuk, S. ; Barter, W. ; Bauer, Th ; Bay, A. ; Beddow, J. ; Bedeschi, F. ; Bediaga, I. ; Belogurov, S. ; Belous, K. ; Belyaev, I. ; Ben-Haim, E. ; Benayoun, M. ; Bencivenni, G. ; Benson, S. ; Benton, J. ; Berezhnoy, A. ; Bernet, R. ; Bettler, M. O. ; Van Beuzekom, M. ; Bien, A. ; Bifani, S. ; Bird, T. ; Bizzeti, A. ; Bjørnstad, P. M. ; Blake, T. ; Blanc, F. ; Blouw, J. ; Blusk, S. ; Bocci, V. ; Bondar, A. ; Bondar, N. ; Bonivento, W. ; Borghi, S. ; Borgia, A. ; Bowcock, T. J.V. ; Bowen, E. ; Bozzi, C. ; Brambach, T. ; Van Den Brand, J. ; Bressieux, J. ; Brett, D. ; Britsch, M. ; Britton, T. ; Brook, N. H. ; Brown, H. ; Burducea, I. ; Bursche, A. ; Busetto, G. ; Buytaert, J. ; Cadeddu, S. ; Callot, O. ; Calvi, M. ; Calvo Gomez, M. ; Camboni, A. ; Campana, P. ; Carbone, A. ; Carboni, G. ; Cardinale, R. ; Cardini, A. ; Carranza-Mejia, H. ; Carson, L. ; Carvalho Akiba, K. ; Casse, G. / Measurement of CP violation and the Bs0 meson decay width difference with Bs0→J/ψK+K- and Bs0→J/ψπ +π - Decays. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2013.
@article{50ee58fff0c24ef28266a91ce1ba2bd9,
title = "Measurement of CP violation and the Bs0 meson decay width difference with Bs0→J/ψK+K- and Bs0→J/ψπ +π - Decays",
abstract = "The time-dependent CP asymmetry in Bs0→J/ψK+K - decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector. The decay-time distribution is characterized by the decay widths ΓL and ΓH of the light and heavy mass eigenstates of the Bs0-B̄s0 system and by a CP-violating phase s. In a sample of 27 617 Bs0→J/ψK+K- decays, where the dominant contribution comes from Bs0→J/ψ decays, these parameters are measured to be s=0.07±0.09(stat) ±0.01(syst) rad, Γs≡(ΓL+Γ H)/2=0.663±0.005(stat)±0.006(syst) ps-1, and ΔΓs≡ΓL-ΓH=0. 100±0.016(stat)±0.003(syst) ps-1, corresponding to the single most precise determination of s, ΔΓs, and Γs. The result of performing a combined analysis with Bs0→J/ψπ+π- decays gives s=0.01±0.07(stat)±0.01(syst) rad, Γs= 0.661±0.004(stat)±0.006(syst) ps-1, and ΔΓs=0.106±0.011(stat)±0.007(syst) ps -1. All measurements are in agreement with the Standard Model predictions. {\circledC} 2013 CERN. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",
author = "R. Aaij and {Abellan Beteta}, C. and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander 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. Anderlini and J. Anderson and R. Andreassen and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and Back, {J. J.} and C. Baesso and V. Balagura and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and Th Bauer and A. Bay and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and M. Benayoun and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and Bettler, {M. O.} and {Van Beuzekom}, M. and A. Bien and S. Bifani and T. Bird and A. Bizzeti and Bj{\o}rnstad, {P. M.} and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and Bowcock, {T. J.V.} and E. Bowen and C. Bozzi and T. Brambach and {Van Den Brand}, J. and J. Bressieux and D. Brett and M. Britsch and T. Britton and Brook, {N. H.} and H. Brown and I. Burducea and A. Bursche and G. Busetto and J. Buytaert and S. Cadeddu and O. Callot and M. Calvi and {Calvo Gomez}, M. and A. Camboni and P. Campana and A. Carbone and G. Carboni and R. Cardinale and A. Cardini and H. Carranza-Mejia and L. Carson and {Carvalho Akiba}, K. and G. Casse",
year = "2013",
month = "6",
day = "21",
doi = "10.1103/PhysRevD.87.112010",
language = "English",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
publisher = "American Physical Society",

}

Aaij, R, Abellan Beteta, C, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, Anderlini, L, Anderson, J, Andreassen, R, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S, Back, JJ, Baesso, C, Balagura, V, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Bauer, T, Bay, A, Beddow, J, Bedeschi, F, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Benayoun, M, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bettler, MO, Van Beuzekom, M, Bien, A, Bifani, S, Bird, T, Bizzeti, A, Bjørnstad, PM, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Bowcock, TJV, Bowen, E, Bozzi, C, Brambach, T, Van Den Brand, J, Bressieux, J, Brett, D, Britsch, M, Britton, T, Brook, NH, Brown, H, Burducea, I, Bursche, A, Busetto, G, Buytaert, J, Cadeddu, S, Callot, O, Calvi, M, Calvo Gomez, M, Camboni, A, Campana, P, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carranza-Mejia, H, Carson, L, Carvalho Akiba, K & Casse, G 2013, 'Measurement of CP violation and the Bs0 meson decay width difference with Bs0→J/ψK+K- and Bs0→J/ψπ +π - Decays', Physical Review D - Particles, Fields, Gravitation and Cosmology. https://doi.org/10.1103/PhysRevD.87.112010

Measurement of CP violation and the Bs0 meson decay width difference with Bs0→J/ψK+K- and Bs0→J/ψπ +π - Decays. / Aaij, R.; Abellan Beteta, C.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A.; Amato, S.; Amerio, S.; Amhis, Y.; Anderlini, L.; Anderson, J.; Andreassen, R.; Appleby, R. B.; Aquines Gutierrez, O.; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Bachmann, S.; Back, J. J.; Baesso, C.; Balagura, V.; Baldini, W.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Bauer, Th; Bay, A.; Beddow, J.; Bedeschi, F.; Bediaga, I.; Belogurov, S.; Belous, K.; Belyaev, I.; Ben-Haim, E.; Benayoun, M.; Bencivenni, G.; Benson, S.; Benton, J.; Berezhnoy, A.; Bernet, R.; Bettler, M. O.; Van Beuzekom, M.; Bien, A.; Bifani, S.; Bird, T.; Bizzeti, A.; Bjørnstad, P. M.; Blake, T.; Blanc, F.; Blouw, J.; Blusk, S.; Bocci, V.; Bondar, A.; Bondar, N.; Bonivento, W.; Borghi, S.; Borgia, A.; Bowcock, T. J.V.; Bowen, E.; Bozzi, C.; Brambach, T.; Van Den Brand, J.; Bressieux, J.; Brett, D.; Britsch, M.; Britton, T.; Brook, N. H.; Brown, H.; Burducea, I.; Bursche, A.; Busetto, G.; Buytaert, J.; Cadeddu, S.; Callot, O.; Calvi, M.; Calvo Gomez, M.; Camboni, A.; Campana, P.; Carbone, A.; Carboni, G.; Cardinale, R.; Cardini, A.; Carranza-Mejia, H.; Carson, L.; Carvalho Akiba, K.; Casse, G.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, 21.06.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measurement of CP violation and the Bs0 meson decay width difference with Bs0→J/ψK+K- and Bs0→J/ψπ +π - Decays

AU - Aaij, R.

AU - Abellan Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, R.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baesso, C.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bauer, Th

AU - Bay, A.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Benayoun, M.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Berezhnoy, A.

AU - Bernet, R.

AU - Bettler, M. O.

AU - Van Beuzekom, M.

AU - Bien, A.

AU - Bifani, S.

AU - Bird, T.

AU - Bizzeti, A.

AU - Bjørnstad, P. M.

AU - Blake, T.

AU - Blanc, F.

AU - Blouw, J.

AU - Blusk, S.

AU - Bocci, V.

AU - Bondar, A.

AU - Bondar, N.

AU - Bonivento, W.

AU - Borghi, S.

AU - Borgia, A.

AU - Bowcock, T. J.V.

AU - Bowen, E.

AU - Bozzi, C.

AU - Brambach, T.

AU - Van Den Brand, J.

AU - Bressieux, J.

AU - Brett, D.

AU - Britsch, M.

AU - Britton, T.

AU - Brook, N. H.

AU - Brown, H.

AU - Burducea, I.

AU - Bursche, A.

AU - Busetto, G.

AU - Buytaert, J.

AU - Cadeddu, S.

AU - Callot, O.

AU - Calvi, M.

AU - Calvo Gomez, M.

AU - Camboni, A.

AU - Campana, P.

AU - Carbone, A.

AU - Carboni, G.

AU - Cardinale, R.

AU - Cardini, A.

AU - Carranza-Mejia, H.

AU - Carson, L.

AU - Carvalho Akiba, K.

AU - Casse, G.

PY - 2013/6/21

Y1 - 2013/6/21

N2 - The time-dependent CP asymmetry in Bs0→J/ψK+K - decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector. The decay-time distribution is characterized by the decay widths ΓL and ΓH of the light and heavy mass eigenstates of the Bs0-B̄s0 system and by a CP-violating phase s. In a sample of 27 617 Bs0→J/ψK+K- decays, where the dominant contribution comes from Bs0→J/ψ decays, these parameters are measured to be s=0.07±0.09(stat) ±0.01(syst) rad, Γs≡(ΓL+Γ H)/2=0.663±0.005(stat)±0.006(syst) ps-1, and ΔΓs≡ΓL-ΓH=0. 100±0.016(stat)±0.003(syst) ps-1, corresponding to the single most precise determination of s, ΔΓs, and Γs. The result of performing a combined analysis with Bs0→J/ψπ+π- decays gives s=0.01±0.07(stat)±0.01(syst) rad, Γs= 0.661±0.004(stat)±0.006(syst) ps-1, and ΔΓs=0.106±0.011(stat)±0.007(syst) ps -1. All measurements are in agreement with the Standard Model predictions. © 2013 CERN. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

AB - The time-dependent CP asymmetry in Bs0→J/ψK+K - decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector. The decay-time distribution is characterized by the decay widths ΓL and ΓH of the light and heavy mass eigenstates of the Bs0-B̄s0 system and by a CP-violating phase s. In a sample of 27 617 Bs0→J/ψK+K- decays, where the dominant contribution comes from Bs0→J/ψ decays, these parameters are measured to be s=0.07±0.09(stat) ±0.01(syst) rad, Γs≡(ΓL+Γ H)/2=0.663±0.005(stat)±0.006(syst) ps-1, and ΔΓs≡ΓL-ΓH=0. 100±0.016(stat)±0.003(syst) ps-1, corresponding to the single most precise determination of s, ΔΓs, and Γs. The result of performing a combined analysis with Bs0→J/ψπ+π- decays gives s=0.01±0.07(stat)±0.01(syst) rad, Γs= 0.661±0.004(stat)±0.006(syst) ps-1, and ΔΓs=0.106±0.011(stat)±0.007(syst) ps -1. All measurements are in agreement with the Standard Model predictions. © 2013 CERN. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

U2 - 10.1103/PhysRevD.87.112010

DO - 10.1103/PhysRevD.87.112010

M3 - Article

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

ER -