First observation of CP violation in the decays of Bs0 mesons

The LHCb Collaboration

doi:10.1103/PhysRevLett.110.221601

First observation of CP violation in the decays of Bs0 mesons

The LHCb Collaboration

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

149 Citations (Scopus)

Abstract

Using pp collision data corresponding to an integrated luminosity of 1.0 fb^-1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K ^-π⁺ decays, A_CP(Bs0→K ^-π⁺)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of Bs0 mesons. Furthermore, we provide an improved determination of direct CP violation in B0→K⁺π^- decays, A_CP(B0→K⁺π^-)=-0.080±0. 007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.

Original language	English
Article number	221601
Number of pages	9
Journal	Physical Review Letters
Volume	110
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.110.221601
Publication status	Published - 30 May 2013
Externally published	Yes

Access to Document

10.1103/PhysRevLett.110.221601

Cite this

@article{fc8e6eabd1a14c9ab19c2a9e808e33ea,

title = "First observation of CP violation in the decays of Bs0 mesons",

abstract = "Using pp collision data corresponding to an integrated luminosity of 1.0 fb-1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K -π+ decays, ACP(Bs0→K -π+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of Bs0 mesons. Furthermore, we provide an improved determination of direct CP violation in B0→K+π- decays, ACP(B0→K+π-)=-0.080±0. 007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.",

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 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 {Campora Perez}, D. 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 and {Castillo Garcia}, L. and M. Cattaneo and Ch Cauet and M. Charles and Ph Charpentier and P. Chen and N. Chiapolini and M. Chrzaszcz and K. Ciba and {Cid Vidal}, X. and G. Ciezarek and Clarke, {P. E.L.} and M. Clemencic and Cliff, {H. V.} and J. Closier and C. Coca and V. Coco and J. Cogan and E. Cogneras and P. Collins and A. Comerma-Montells and A. Contu and A. Cook and M. Coombes and S. Coquereau and G. Corti and B. Couturier and Cowan, {G. A.} and Craik, {D. C.} and S. Cunliffe and R. Currie and C. D'Ambrosio and P. David and David, {P. N.Y.} and A. Davis and {De Bonis}, I. and {De Bruyn}, K. and {De Capua}, S. and {De Cian}, M. and {De Miranda}, {J. M.} and {De Paula}, L. and {De Silva}, W. and {De Simone}, P. and D. Decamp and M. Deckenhoff and {Del Buono}, L. and N. D{\'e}l{\'e}age and D. Derkach and O. Deschamps and F. Dettori and {Di Canto}, A. and {Di Ruscio}, F. and H. Dijkstra and M. Dogaru and S. Donleavy and F. Dordei and {Dosil Su{\'a}rez}, A. and D. Dossett and A. Dovbnya and F. Dupertuis and R. Dzhelyadin and A. Dziurda and A. Dzyuba and S. Easo and U. Egede and V. Egorychev and S. Eidelman and {Van Eijk}, D. and S. Eisenhardt and U. Eitschberger and R. Ekelhof and L. Eklund and {El Rifai}, I. and Ch Elsasser and D. Elsby and A. Falabella and C. F{\"a}rber and G. Fardell and C. Farinelli and S. Farry and V. Fave and D. Ferguson and {Fernandez Albor}, V. and {Ferreira Rodrigues}, F. and M. Ferro-Luzzi and S. Filippov and M. Fiore and C. Fitzpatrick and M. Fontana and F. Fontanelli and R. Forty and O. Francisco and M. Frank and C. Frei and M. Frosini and S. Furcas and E. Furfaro and {Gallas Torreira}, A. and D. Galli and M. Gandelman and P. Gandini and Y. Gao and J. Garofoli and P. Garosi and {Garra Tico}, J. and L. Garrido and C. Gaspar and R. Gauld and E. Gersabeck and M. Gersabeck and T. Gershon and Ph Ghez and V. Gibson and Gligorov, {V. V.} and C. G{\"o}bel and D. Golubkov and A. Golutvin and A. Gomes and H. Gordon and {Grabalosa G{\'a}ndara}, M. and {Graciani Diaz}, R. and {Granado Cardoso}, {L. A.} and E. Graug{\'e}s and G. Graziani and A. Grecu and E. Greening and S. Gregson and P. Griffith and O. Gr{\"u}nberg and B. Gui and E. Gushchin and Yu Guz and T. Gys and C. Hadjivasiliou and G. Haefeli and C. Haen and Haines, {S. C.} and S. Hall and T. Hampson and S. Hansmann-Menzemer and N. Harnew and Harnew, {S. T.} and J. Harrison and T. Hartmann and J. He and V. Heijne and K. Hennessy and P. Henrard and {Hernando Morata}, {J. A.} and {Van Herwijnen}, E. and E. Hicks and D. Hill and M. Hoballah and {The LHCb Collaboration}",

year = "2013",

month = may,

day = "30",

doi = "10.1103/PhysRevLett.110.221601",

language = "English",

volume = "110",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "22",

}

TY - JOUR

T1 - First observation of CP violation in the decays of Bs0 mesons

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 - 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 - Campora Perez, D.

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.

AU - Castillo Garcia, L.

AU - Cattaneo, M.

AU - Cauet, Ch

AU - Charles, M.

AU - Charpentier, Ph

AU - Chen, P.

AU - Chiapolini, N.

AU - Chrzaszcz, M.

AU - Ciba, K.

AU - Cid Vidal, X.

AU - Ciezarek, G.

AU - Clarke, P. E.L.

AU - Clemencic, M.

AU - Cliff, H. V.

AU - Closier, J.

AU - Coca, C.

AU - Coco, V.

AU - Cogan, J.

AU - Cogneras, E.

AU - Collins, P.

AU - Comerma-Montells, A.

AU - Contu, A.

AU - Cook, A.

AU - Coombes, M.

AU - Coquereau, S.

AU - Corti, G.

AU - Couturier, B.

AU - Cowan, G. A.

AU - Craik, D. C.

AU - Cunliffe, S.

AU - Currie, R.

AU - D'Ambrosio, C.

AU - David, P.

AU - David, P. N.Y.

AU - Davis, A.

AU - De Bonis, I.

AU - De Bruyn, K.

AU - De Capua, S.

AU - De Cian, M.

AU - De Miranda, J. M.

AU - De Paula, L.

AU - De Silva, W.

AU - De Simone, P.

AU - Decamp, D.

AU - Deckenhoff, M.

AU - Del Buono, L.

AU - Déléage, N.

AU - Derkach, D.

AU - Deschamps, O.

AU - Dettori, F.

AU - Di Canto, A.

AU - Di Ruscio, F.

AU - Dijkstra, H.

AU - Dogaru, M.

AU - Donleavy, S.

AU - Dordei, F.

AU - Dosil Suárez, A.

AU - Dossett, D.

AU - Dovbnya, A.

AU - Dupertuis, F.

AU - Dzhelyadin, R.

AU - Dziurda, A.

AU - Dzyuba, A.

AU - Easo, S.

AU - Egede, U.

AU - Egorychev, V.

AU - Eidelman, S.

AU - Van Eijk, D.

AU - Eisenhardt, S.

AU - Eitschberger, U.

AU - Ekelhof, R.

AU - Eklund, L.

AU - El Rifai, I.

AU - Elsasser, Ch

AU - Elsby, D.

AU - Falabella, A.

AU - Färber, C.

AU - Fardell, G.

AU - Farinelli, C.

AU - Farry, S.

AU - Fave, V.

AU - Ferguson, D.

AU - Fernandez Albor, V.

AU - Ferreira Rodrigues, F.

AU - Ferro-Luzzi, M.

AU - Filippov, S.

AU - Fiore, M.

AU - Fitzpatrick, C.

AU - Fontana, M.

AU - Fontanelli, F.

AU - Forty, R.

AU - Francisco, O.

AU - Frank, M.

AU - Frei, C.

AU - Frosini, M.

AU - Furcas, S.

AU - Furfaro, E.

AU - Gallas Torreira, A.

AU - Galli, D.

AU - Gandelman, M.

AU - Gandini, P.

AU - Gao, Y.

AU - Garofoli, J.

AU - Garosi, P.

AU - Garra Tico, J.

AU - Garrido, L.

AU - Gaspar, C.

AU - Gauld, R.

AU - Gersabeck, E.

AU - Gersabeck, M.

AU - Gershon, T.

AU - Ghez, Ph

AU - Gibson, V.

AU - Gligorov, V. V.

AU - Göbel, C.

AU - Golubkov, D.

AU - Golutvin, A.

AU - Gomes, A.

AU - Gordon, H.

AU - Grabalosa Gándara, M.

AU - Graciani Diaz, R.

AU - Granado Cardoso, L. A.

AU - Graugés, E.

AU - Graziani, G.

AU - Grecu, A.

AU - Greening, E.

AU - Gregson, S.

AU - Griffith, P.

AU - Grünberg, O.

AU - Gui, B.

AU - Gushchin, E.

AU - Guz, Yu

AU - Gys, T.

AU - Hadjivasiliou, C.

AU - Haefeli, G.

AU - Haen, C.

AU - Haines, S. C.

AU - Hall, S.

AU - Hampson, T.

AU - Hansmann-Menzemer, S.

AU - Harnew, N.

AU - Harnew, S. T.

AU - Harrison, J.

AU - Hartmann, T.

AU - He, J.

AU - Heijne, V.

AU - Hennessy, K.

AU - Henrard, P.

AU - Hernando Morata, J. A.

AU - Van Herwijnen, E.

AU - Hicks, E.

AU - Hill, D.

AU - Hoballah, M.

AU - The LHCb Collaboration

PY - 2013/5/30

Y1 - 2013/5/30

N2 - Using pp collision data corresponding to an integrated luminosity of 1.0 fb-1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K -π+ decays, ACP(Bs0→K -π+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of Bs0 mesons. Furthermore, we provide an improved determination of direct CP violation in B0→K+π- decays, ACP(B0→K+π-)=-0.080±0. 007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.

AB - Using pp collision data corresponding to an integrated luminosity of 1.0 fb-1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K -π+ decays, ACP(Bs0→K -π+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of Bs0 mesons. Furthermore, we provide an improved determination of direct CP violation in B0→K+π- decays, ACP(B0→K+π-)=-0.080±0. 007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.

UR - http://www.scopus.com/inward/record.url?scp=84878371797&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.110.221601

DO - 10.1103/PhysRevLett.110.221601

M3 - Article

AN - SCOPUS:84878371797

SN - 0031-9007

VL - 110

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 221601

ER -

First observation of CP violation in the decays of Bs0 mesons

Abstract

Access to Document

Other files and links

Cite this