Observation of the decay B-0s→ ψ(2S)K+π-

LHCb Collaboration; R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; J. Anderson; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; A. Badalov; C. Baesso; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; V. Batozskaya; S. Bifani; N. Farley; P. Griffith; P. Ilten; I. R. Kenyon; C. Lazzeroni; A. Mazurov; J. McCarthy; L. Pescatore; D. Popov; N. K. Watson

doi:10.1016/j.physletb.2015.06.038

Observation of the decay B^-0_s→ ψ(2S)K⁺π^-

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, L. Pescatore, D. Popov, N. K. Watson

Physics and Astronomy

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Abstract

The decay B^-0_s→ ψ(2S)K⁺π^-is observed using a data set corresponding to an integrated luminosity of 3.0fb^-1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B⁰→ ψ(2S)K⁺π^-decay mode is measured to be

B(B^-0_s→ψ(2S)K⁺π⁻) / B(B⁰→ψ(2S)K⁺π⁻) =5.38±0.36(stat)±0.22(syst)±0.31(f_s/f_d)%, where f_s/f_d indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B⁰_sor B⁰meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K^*(892)⁰meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be B(B^-0_s→ψ(2S)K^∗(892)⁰) / B(B⁰→ψ(2S)K^∗(892)⁰)=5.58±0.57(stat)±0.40(syst)±0.32(f_s/f_d)%. In addition, the mass splitting between the B⁰_sand B⁰mesons is measured as M(B⁰_s)-M(B⁰) = 87.45±0.44(stat)±0.09(syst)MeV/c².

Original language	English
Pages (from-to)	484-494
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	747
Early online date	17 Jun 2015
DOIs	https://doi.org/10.1016/j.physletb.2015.06.038
Publication status	Published - 30 Jul 2015

ASJC Scopus subject areas

Nuclear and High Energy Physics

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LHCb Collaboration, 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., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., ... Watson, N. K. (2015). Observation of the decay B^-0_s→ ψ(2S)K⁺π^-. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 747, 484-494. Advance online publication. https://doi.org/10.1016/j.physletb.2015.06.038

@article{835622dd845d4ad2b5c8674904ea81a4,

title = "Observation of the decay B-0s→ ψ(2S)K+π-",

abstract = "The decay B-0s→ ψ(2S)K+π- is observed using a data set corresponding to an integrated luminosity of 3.0fb-1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B0→ ψ(2S)K+π- decay mode is measured to beB(B-0s→ψ(2S)K+π−) / B(B0→ψ(2S)K+π−) =5.38±0.36(stat)±0.22(syst)±0.31(fs/fd)%, where fs/fd indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0s or B0 meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K*(892)0 meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be B(B-0s→ψ(2S)K∗(892)0) / B(B0→ψ(2S)K∗(892)0)=5.58±0.57(stat)±0.40(syst)±0.32(fs/fd)%. In addition, the mass splitting between the B0sand B0mesons is measured as M(B0s)-M(B0) = 87.45±0.44(stat)±0.09(syst)MeV/c2.",

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and S. Akar 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. An and L. Anderlini and J. Anderson and M. Andreotti 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 A. Badalov and C. Baesso and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and S. Bifani and N. Farley and P. Griffith and P. Ilten and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and L. Pescatore and D. Popov and Watson, {N. K.}",

year = "2015",

month = jul,

day = "30",

doi = "10.1016/j.physletb.2015.06.038",

language = "English",

volume = "747",

pages = "484--494",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

LHCb Collaboration, 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, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Bifani, S, Farley, N, Griffith, P, Ilten, P, Kenyon, IR, Lazzeroni, C, Mazurov, A, McCarthy, J, Pescatore, L, Popov, D & Watson, NK 2015, 'Observation of the decay B^-0_s→ ψ(2S)K⁺π^-', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 747, pp. 484-494. https://doi.org/10.1016/j.physletb.2015.06.038

TY - JOUR

T1 - Observation of the decay B-0s→ ψ(2S)K+π-

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Akar, S.

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 - An, L.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreotti, M.

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 - Badalov, A.

AU - Baesso, C.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Bifani, S.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Pescatore, L.

AU - Popov, D.

AU - Watson, N. K.

PY - 2015/7/30

Y1 - 2015/7/30

N2 - The decay B-0s→ ψ(2S)K+π- is observed using a data set corresponding to an integrated luminosity of 3.0fb-1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B0→ ψ(2S)K+π- decay mode is measured to beB(B-0s→ψ(2S)K+π−) / B(B0→ψ(2S)K+π−) =5.38±0.36(stat)±0.22(syst)±0.31(fs/fd)%, where fs/fd indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0s or B0 meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K*(892)0 meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be B(B-0s→ψ(2S)K∗(892)0) / B(B0→ψ(2S)K∗(892)0)=5.58±0.57(stat)±0.40(syst)±0.32(fs/fd)%. In addition, the mass splitting between the B0sand B0mesons is measured as M(B0s)-M(B0) = 87.45±0.44(stat)±0.09(syst)MeV/c2.

AB - The decay B-0s→ ψ(2S)K+π- is observed using a data set corresponding to an integrated luminosity of 3.0fb-1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B0→ ψ(2S)K+π- decay mode is measured to beB(B-0s→ψ(2S)K+π−) / B(B0→ψ(2S)K+π−) =5.38±0.36(stat)±0.22(syst)±0.31(fs/fd)%, where fs/fd indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B0s or B0 meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K*(892)0 meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be B(B-0s→ψ(2S)K∗(892)0) / B(B0→ψ(2S)K∗(892)0)=5.58±0.57(stat)±0.40(syst)±0.32(fs/fd)%. In addition, the mass splitting between the B0sand B0mesons is measured as M(B0s)-M(B0) = 87.45±0.44(stat)±0.09(syst)MeV/c2.

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DO - 10.1016/j.physletb.2015.06.038

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SN - 0370-2693

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EP - 494

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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