Measurement of the B-s(0) -> J/psi (K)over-bar(*0) branching fraction and angular amplitudes

LHCb collaboration

doi:10.1103/PhysRevD.86.071102

Measurement of the B-s(0) -> J/psi (K)over-bar(*0) branching fraction and angular amplitudes

LHCb collaboration

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

Abstract

A sample of 114 +/- 11 B-s(0) -> J/psi K- pi(+) signal events obtained with 0.37 fb(-1) of pp collisions at root s = 7 TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the B-s(0) -> J/psi(K) over bar*(0) decay, with (K) over bar*(0) -> K- pi(+). The K- pi(+) mass spectrum of the candidates in the B-s(0) peak is dominated by the (K) over bar*(0) contribution. Subtracting the nonresonant K- pi(+) component, the branching fraction of B-s(0) -> J/pi (K) over bar*(0) is (4.4(-0.4)(+0.5) +/- 0.8) x 10(-5), where the first uncertainty is statistical and the second is systematic. A fit to the angular distribution of the decay products yields the K*(0) polarization fractions f(L) = 0.50 +/- 0.08 +/- 0.02 and f(parallel to) = 0.19(-0.08)(+0.10) +/- 0.02.

Original language	English
Article number	071102
Number of pages	9
Journal	Physical Review D
Volume	86
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.86.071102
Publication status	Published - 8 Oct 2012
Externally published	Yes

Keywords

DECAY

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10.1103/PhysRevD.86.071102Licence: CC BY

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@article{4ab80061eaaa43829f25c7ac90644c61,

title = "Measurement of the B-s(0) -> J/psi (K)over-bar(*0) branching fraction and angular amplitudes",

abstract = "A sample of 114 +/- 11 B-s(0) -> J/psi K- pi(+) signal events obtained with 0.37 fb(-1) of pp collisions at root s = 7 TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the B-s(0) -> J/psi(K) over bar*(0) decay, with (K) over bar*(0) -> K- pi(+). The K- pi(+) mass spectrum of the candidates in the B-s(0) peak is dominated by the (K) over bar*(0) contribution. Subtracting the nonresonant K- pi(+) component, the branching fraction of B-s(0) -> J/pi (K) over bar*(0) is (4.4(-0.4)(+0.5) +/- 0.8) x 10(-5), where the first uncertainty is statistical and the second is systematic. A fit to the angular distribution of the decay products yields the K*(0) polarization fractions f(L) = 0.50 +/- 0.08 +/- 0.02 and f(parallel to) = 0.19(-0.08)(+0.10) +/- 0.02.",

keywords = "DECAY",

author = "R. Aaij and C.A. Beteta and A. Adametz 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 P.A. Cartelle and A.A. Alves and S. Amato and Y. Amhis and J. Anderson and R.B. Appleby and O.A. Gutierrez and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and J.J. Back and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and W. Barter and A. Bates and C. Bauer and T. Bauer and A. Bay and J. Beddow 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 M.O. Bettler and {van den Brand}, J. and {LHCb collaboration}",

year = "2012",

month = oct,

day = "8",

doi = "10.1103/PhysRevD.86.071102",

language = "English",

volume = "86",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "7",

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TY - JOUR

T1 - Measurement of the B-s(0) -> J/psi (K)over-bar(*0) branching fraction and angular amplitudes

AU - Aaij, R.

AU - Beteta, C.A.

AU - Adametz, A.

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 - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amhis, Y.

AU - Anderson, J.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J.J.

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 - Beddow, J.

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 den Brand, J.

AU - LHCb collaboration

PY - 2012/10/8

Y1 - 2012/10/8

N2 - A sample of 114 +/- 11 B-s(0) -> J/psi K- pi(+) signal events obtained with 0.37 fb(-1) of pp collisions at root s = 7 TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the B-s(0) -> J/psi(K) over bar*(0) decay, with (K) over bar*(0) -> K- pi(+). The K- pi(+) mass spectrum of the candidates in the B-s(0) peak is dominated by the (K) over bar*(0) contribution. Subtracting the nonresonant K- pi(+) component, the branching fraction of B-s(0) -> J/pi (K) over bar*(0) is (4.4(-0.4)(+0.5) +/- 0.8) x 10(-5), where the first uncertainty is statistical and the second is systematic. A fit to the angular distribution of the decay products yields the K*(0) polarization fractions f(L) = 0.50 +/- 0.08 +/- 0.02 and f(parallel to) = 0.19(-0.08)(+0.10) +/- 0.02.

AB - A sample of 114 +/- 11 B-s(0) -> J/psi K- pi(+) signal events obtained with 0.37 fb(-1) of pp collisions at root s = 7 TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the B-s(0) -> J/psi(K) over bar*(0) decay, with (K) over bar*(0) -> K- pi(+). The K- pi(+) mass spectrum of the candidates in the B-s(0) peak is dominated by the (K) over bar*(0) contribution. Subtracting the nonresonant K- pi(+) component, the branching fraction of B-s(0) -> J/pi (K) over bar*(0) is (4.4(-0.4)(+0.5) +/- 0.8) x 10(-5), where the first uncertainty is statistical and the second is systematic. A fit to the angular distribution of the decay products yields the K*(0) polarization fractions f(L) = 0.50 +/- 0.08 +/- 0.02 and f(parallel to) = 0.19(-0.08)(+0.10) +/- 0.02.

KW - DECAY

U2 - 10.1103/PhysRevD.86.071102

DO - 10.1103/PhysRevD.86.071102

M3 - Article

SN - 1550-7998

VL - 86

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 071102

ER -

Measurement of the B-s(0) -> J/psi (K)over-bar(*0) branching fraction and angular amplitudes

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