Measurement of the CP asymmetry in B+→K+μ +μ- decays

The LHCb Collaboration

doi:10.1103/PhysRevLett.111.151801

Measurement of the CP asymmetry in B⁺→K⁺μ ⁺μ^- decays

The LHCb Collaboration

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

18 Citations (Scopus)

Abstract

A measurement of the CP asymmetry in B⁺→K ⁺μ⁺μ^- decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb ^-1, recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of μ⁺μ^- invariant mass squared in the range 0.05<q2<22.00 GeV2/c4, excluding the J/ψ and ψ(2S) resonance regions. Production and detection asymmetries are corrected for using the B ⁺→J/ψK⁺ decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be A_CP=0.000±0.033 (stat)±0.005 (syst)±0.007 (J/ψK), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.

Original language	English
Article number	151801
Number of pages	9
Journal	Physical Review Letters
Volume	111
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.111.151801
Publication status	Published - 7 Oct 2013
Externally published	Yes

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10.1103/PhysRevLett.111.151801

Cite this

@article{a29eb5edea6a43ada391df5dbb8a7809,

title = "Measurement of the CP asymmetry in B+→K+μ +μ- decays",

abstract = "A measurement of the CP asymmetry in B+→K +μ+μ- decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb -1, recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of μ+μ- invariant mass squared in the range 0.05+→J/ψK+ decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be ACP=0.000±0.033 (stat)±0.005 (syst)±0.007 (J/ψK), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.",

author = "R. Aaij 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 Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch 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 R. Cenci 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 E. Cowie 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 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 P. Durante 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 A. Falabella and C. F{\"a}rber and G. Fardell and C. Farinelli and S. Farry 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 L. Giubega and Gligorov, {V. V.} and C. G{\"o}bel and D. Golubkov and A. Golutvin and A. Gomes and P. Gorbounov and H. Gordon and C. Gotti 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 B. Hamilton and T. Hampson and S. Hansmann-Menzemer and N. Harnew and Harnew, {S. T.} and J. Harrison and T. Hartmann and J. He and T. Head and V. Heijne and K. Hennessy and {The LHCb Collaboration}",

year = "2013",

month = oct,

day = "7",

doi = "10.1103/PhysRevLett.111.151801",

language = "English",

volume = "111",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

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TY - JOUR

T1 - Measurement of the CP asymmetry in B+→K+μ +μ- decays

AU - Aaij, R.

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 - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

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 - Cenci, R.

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 - Cowie, E.

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 - 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 - Durante, P.

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 - Falabella, A.

AU - Färber, C.

AU - Fardell, G.

AU - Farinelli, C.

AU - Farry, S.

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 - Giubega, L.

AU - Gligorov, V. V.

AU - Göbel, C.

AU - Golubkov, D.

AU - Golutvin, A.

AU - Gomes, A.

AU - Gorbounov, P.

AU - Gordon, H.

AU - Gotti, C.

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 - Hamilton, B.

AU - Hampson, T.

AU - Hansmann-Menzemer, S.

AU - Harnew, N.

AU - Harnew, S. T.

AU - Harrison, J.

AU - Hartmann, T.

AU - He, J.

AU - Head, T.

AU - Heijne, V.

AU - Hennessy, K.

AU - The LHCb Collaboration

PY - 2013/10/7

Y1 - 2013/10/7

N2 - A measurement of the CP asymmetry in B+→K +μ+μ- decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb -1, recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of μ+μ- invariant mass squared in the range 0.05+→J/ψK+ decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be ACP=0.000±0.033 (stat)±0.005 (syst)±0.007 (J/ψK), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.

AB - A measurement of the CP asymmetry in B+→K +μ+μ- decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb -1, recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of μ+μ- invariant mass squared in the range 0.05+→J/ψK+ decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be ACP=0.000±0.033 (stat)±0.005 (syst)±0.007 (J/ψK), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.

UR - http://www.scopus.com/inward/record.url?scp=84885414363&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.111.151801

DO - 10.1103/PhysRevLett.111.151801

M3 - Article

AN - SCOPUS:84885414363

SN - 0031-9007

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151801

ER -

Measurement of the CP asymmetry in B+→K+μ +μ- decays

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Measurement of the CP asymmetry in B⁺→K⁺μ ⁺μ^- decays