First observation of the decay Bs0→K*0K̄*0

The LHCb Collaboration

doi:10.1016/j.physletb.2012.02.001

First observation of the decay B_s⁰→K^0K̄^0

The LHCb Collaboration

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

46 Citations (Scopus)

Abstract

The first observation of the decay B_s⁰→K^*0K̄^*0 is reported using 35 pb^-1 of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 Bs0→(K⁺π^-)(K^-π⁺) events are observed within ±50 MeV/c² of the B_s⁰ mass and 746 MeV/c²<m_Kπ<1046 MeV/c², mostly coming from a resonant B_s⁰→K^*0K̄^*0 signal. The branching fraction and the CP-averaged K^{^*0} longitudinal polarization fraction are measured to be B(B_s⁰→K^*0K̄^*0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(f_s/f_d))×10^-5 and f_L=0.31±0.12(stat.)±0.04(syst.).

Original language	English
Pages (from-to)	50-58
Number of pages	9
Journal	Physics Letters B
Volume	709
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2012.02.001
Publication status	Published - 13 Mar 2012
Externally published	Yes

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10.1016/j.physletb.2012.02.001

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@article{c7c5c112cde148f3bf62c370c4aa7318,

title = "First observation of the decay Bs0→K*0{\=K}*0",

abstract = "The first observation of the decay Bs0→K*0{\=K}*0 is reported using 35 pb-1 of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 Bs0→(K+π-)(K-π+) events are observed within ±50 MeV/c2 of the Bs0 mass and 746 MeV/c2Kπ<1046 MeV/c2, mostly coming from a resonant Bs0→K*0{\=K}*0 signal. The branching fraction and the CP-averaged K*0 longitudinal polarization fraction are measured to be B(Bs0→K*0{\=K}*0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(fs/fd))×10-5 and fL=0.31±0.12(stat.)±0.04(syst.).",

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 G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and Y. Amhis and J. Anderson and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and L. Arrabito and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and Back, {J. J.} and Bailey, {D. S.} and V. Balagura and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and A. Bates and C. Bauer and T. Bauer and A. Bay 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 R. Bernet and Bettler, {M. O.} and {van Beuzekom}, M. and A. Bien and S. Bifani and A. Bizzeti and Bj{\o}rnstad, {P. M.} and T. Blake and F. Blanc and C. Blanks and J. Blouw and S. Blusk and A. Bobrov and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and Bowcock, {T. J.V.} and C. Bozzi and T. Brambach and {van den Brand}, J. and J. Bressieux and D. Brett and S. Brisbane and M. Britsch and T. Britton and Brook, {N. H.} and H. Brown and A. B{\"u}chler-Germann and I. Burducea and A. Bursche and J. Buytaert and S. Cadeddu and {Caicedo Carvajal}, {J. M.} 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 L. Carson and {Carvalho Akiba}, K. and G. Casse and M. Cattaneo and M. Charles and P. Charpentier and N. Chiapolini 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 P. Collins and A. Comerma-Montells and F. Constantin and G. Conti and A. Contu and A. Cook and M. Coombes and G. Corti and Cowan, {G. A.} and R. Currie and B. D'Almagne and C. D'Ambrosio and P. David and {De Bonis}, I. and {De Capua}, S. and {De Cian}, M. and {De Lorenzi}, F. and {De Miranda}, {J. M.} and {De Paula}, L. and {De Simone}, P. and D. Decamp and M. Deckenhoff and H. Degaudenzi and M. Deissenroth and {Del Buono}, L. and C. Deplano and D. Derkach and O. Deschamps and F. Dettori and J. Dickens and H. Dijkstra and {Diniz Batista}, P. and {Domingo Bonal}, F. 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 S. Easo and U. Egede and V. Egorychev and S. Eidelman and {van Eijk}, D. and F. Eisele and S. Eisenhardt and R. Ekelhof and L. Eklund and C. Elsasser and {Esperante Pereira}, D. and L. Est{\`e}ve and A. Falabella and E. Fanchini and C. F{\"a}rber and G. Fardell and C. Farinelli and S. Farry and V. Fave and {Fernandez Albor}, V. and M. Ferro-Luzzi and S. Filippov and C. Fitzpatrick and M. Fontana and F. Fontanelli and R. Forty and M. Frank and C. Frei and M. Frosini and S. Furcas and {Gallas Torreira}, A. and D. Galli and M. Gandelman and P. Gandini and Y. Gao and Garnier, {J. C.} and J. Garofoli and {Garra Tico}, J. and L. Garrido and D. Gascon and C. Gaspar and N. Gauvin and M. Gersabeck and T. Gershon and P. Ghez and A. Giachero 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 B. Gui and E. Gushchin and Y. Guz and T. Gys and G. Haefeli and C. Haen and Haines, {S. C.} and T. Hampson and S. Hansmann-Menzemer and R. Harji and N. Harnew and J. Harrison and Harrison, {P. F.} 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 K. Holubyev and P. Hopchev and W. Hulsbergen and P. Hunt and T. Huse and Huston, {R. S.} and D. Hutchcroft and D. Hynds and V. Iakovenko and P. Ilten and J. Imong and R. Jacobsson and A. Jaeger and {Jahjah Hussein}, M. and E. Jans and F. Jansen and P. Jaton and B. Jean-Marie and F. Jing and M. John and {The LHCb Collaboration}",

year = "2012",

month = mar,

day = "13",

doi = "10.1016/j.physletb.2012.02.001",

language = "English",

volume = "709",

pages = "50--58",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier BV",

number = "1-2",

}

TY - JOUR

T1 - First observation of the decay Bs0→K*0K̄*0

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 - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - Anderson, J.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Arrabito, L.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J. J.

AU - Bailey, D. S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, T.

AU - Bay, A.

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 - Bernet, R.

AU - Bettler, M. O.

AU - van Beuzekom, M.

AU - Bien, A.

AU - Bifani, S.

AU - Bizzeti, A.

AU - Bjørnstad, P. M.

AU - Blake, T.

AU - Blanc, F.

AU - Blanks, C.

AU - Blouw, J.

AU - Blusk, S.

AU - Bobrov, A.

AU - Bocci, V.

AU - Bondar, A.

AU - Bondar, N.

AU - Bonivento, W.

AU - Borghi, S.

AU - Borgia, A.

AU - Bowcock, T. J.V.

AU - Bozzi, C.

AU - Brambach, T.

AU - van den Brand, J.

AU - Bressieux, J.

AU - Brett, D.

AU - Brisbane, S.

AU - Britsch, M.

AU - Britton, T.

AU - Brook, N. H.

AU - Brown, H.

AU - Büchler-Germann, A.

AU - Burducea, I.

AU - Bursche, A.

AU - Buytaert, J.

AU - Cadeddu, S.

AU - Caicedo Carvajal, J. M.

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 - Carson, L.

AU - Carvalho Akiba, K.

AU - Casse, G.

AU - Cattaneo, M.

AU - Charles, M.

AU - Charpentier, P.

AU - Chiapolini, N.

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 - Collins, P.

AU - Comerma-Montells, A.

AU - Constantin, F.

AU - Conti, G.

AU - Contu, A.

AU - Cook, A.

AU - Coombes, M.

AU - Corti, G.

AU - Cowan, G. A.

AU - Currie, R.

AU - D'Almagne, B.

AU - D'Ambrosio, C.

AU - David, P.

AU - De Bonis, I.

AU - De Capua, S.

AU - De Cian, M.

AU - De Lorenzi, F.

AU - De Miranda, J. M.

AU - De Paula, L.

AU - De Simone, P.

AU - Decamp, D.

AU - Deckenhoff, M.

AU - Degaudenzi, H.

AU - Deissenroth, M.

AU - Del Buono, L.

AU - Deplano, C.

AU - Derkach, D.

AU - Deschamps, O.

AU - Dettori, F.

AU - Dickens, J.

AU - Dijkstra, H.

AU - Diniz Batista, P.

AU - Domingo Bonal, F.

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 - Easo, S.

AU - Egede, U.

AU - Egorychev, V.

AU - Eidelman, S.

AU - van Eijk, D.

AU - Eisele, F.

AU - Eisenhardt, S.

AU - Ekelhof, R.

AU - Eklund, L.

AU - Elsasser, C.

AU - Esperante Pereira, D.

AU - Estève, L.

AU - Falabella, A.

AU - Fanchini, E.

AU - Färber, C.

AU - Fardell, G.

AU - Farinelli, C.

AU - Farry, S.

AU - Fave, V.

AU - Fernandez Albor, V.

AU - Ferro-Luzzi, M.

AU - Filippov, S.

AU - Fitzpatrick, C.

AU - Fontana, M.

AU - Fontanelli, F.

AU - Forty, R.

AU - Frank, M.

AU - Frei, C.

AU - Frosini, M.

AU - Furcas, S.

AU - Gallas Torreira, A.

AU - Galli, D.

AU - Gandelman, M.

AU - Gandini, P.

AU - Gao, Y.

AU - Garnier, J. C.

AU - Garofoli, J.

AU - Garra Tico, J.

AU - Garrido, L.

AU - Gascon, D.

AU - Gaspar, C.

AU - Gauvin, N.

AU - Gersabeck, M.

AU - Gershon, T.

AU - Ghez, P.

AU - Giachero, A.

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 - Gui, B.

AU - Gushchin, E.

AU - Guz, Y.

AU - Gys, T.

AU - Haefeli, G.

AU - Haen, C.

AU - Haines, S. C.

AU - Hampson, T.

AU - Hansmann-Menzemer, S.

AU - Harji, R.

AU - Harnew, N.

AU - Harrison, J.

AU - Harrison, P. F.

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 - Holubyev, K.

AU - Hopchev, P.

AU - Hulsbergen, W.

AU - Hunt, P.

AU - Huse, T.

AU - Huston, R. S.

AU - Hutchcroft, D.

AU - Hynds, D.

AU - Iakovenko, V.

AU - Ilten, P.

AU - Imong, J.

AU - Jacobsson, R.

AU - Jaeger, A.

AU - Jahjah Hussein, M.

AU - Jans, E.

AU - Jansen, F.

AU - Jaton, P.

AU - Jean-Marie, B.

AU - Jing, F.

AU - John, M.

AU - The LHCb Collaboration

PY - 2012/3/13

Y1 - 2012/3/13

N2 - The first observation of the decay Bs0→K*0K̄*0 is reported using 35 pb-1 of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 Bs0→(K+π-)(K-π+) events are observed within ±50 MeV/c2 of the Bs0 mass and 746 MeV/c2Kπ<1046 MeV/c2, mostly coming from a resonant Bs0→K*0K̄*0 signal. The branching fraction and the CP-averaged K*0 longitudinal polarization fraction are measured to be B(Bs0→K*0K̄*0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(fs/fd))×10-5 and fL=0.31±0.12(stat.)±0.04(syst.).

AB - The first observation of the decay Bs0→K*0K̄*0 is reported using 35 pb-1 of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 Bs0→(K+π-)(K-π+) events are observed within ±50 MeV/c2 of the Bs0 mass and 746 MeV/c2Kπ<1046 MeV/c2, mostly coming from a resonant Bs0→K*0K̄*0 signal. The branching fraction and the CP-averaged K*0 longitudinal polarization fraction are measured to be B(Bs0→K*0K̄*0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(fs/fd))×10-5 and fL=0.31±0.12(stat.)±0.04(syst.).

UR - http://www.scopus.com/inward/record.url?scp=84937644637&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2012.02.001

DO - 10.1016/j.physletb.2012.02.001

M3 - Article

AN - SCOPUS:84937644637

VL - 709

SP - 50

EP - 58

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 1-2

ER -

First observation of the decay Bs0→K*0K̄*0

Abstract

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First observation of the decay B_s⁰→K^0K̄^0