Measurements of the S-wave fraction in B 0 → K + π − μ + μ − decays and the B 0 → K ∗(892)0 μ + μ − differential branching fraction

LHCb Collaboration

doi:10.1007/JHEP11(2016)047

Measurements of the S-wave fraction in B ⁰ → K ⁺ π ⁻ μ ⁺ μ ⁻ decays and the B ⁰ → K ^∗(892)⁰ μ ⁺ μ ⁻ differential branching fraction

LHCb Collaboration

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

70 Citations (Scopus)

114 Downloads (Pure)

Abstract

A measurement of the differential branching fraction of the decay B⁰ → K^∗(892)⁰μ⁺μ⁻ is presented together with a determination of the S-wave fraction of the K⁺π⁻ system in the decay B⁰ → K⁺π⁻μ⁺μ⁻. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb⁻¹ collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q². Precise theoretical predictions for the differential branching fraction of B⁰ → K^∗(892)⁰μ⁺μ⁻ decays are available for the q² region 1.1 < q²< 6.0 GeV²/c⁴. In this q² region, for the K⁺π⁻ invariant mass range 796 < m_Kπ< 996 MeV/c², the S-wave fraction of the K⁺π⁻ system in B⁰ → K⁺π⁻μ⁺μ⁻ decays is found to be F_S=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B⁰ → K^∗(892)⁰μ⁺μ⁻ decays is determined to be dℬ/dq²=(0.392_−0.019 ^+0.020(stat)±0.010(syst)±0.027(norm))×10⁻⁷c⁴/GeV². The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.

Original language	English
Article number	47
Journal	Journal of High Energy Physics
Volume	2016
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2016)047
Publication status	Published - 8 Nov 2016

Keywords

B physics
Hadron-Hadron scattering (experiments)
Rare decay

ASJC Scopus subject areas

Nuclear and High Energy Physics

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70 Citations
1 Comment/debate

Erratum to: Measurements of the S-wave fraction in B 0 → K + π − μ + μ − decays and the B 0 → K ∗(892)0 μ + μ − differential branching fraction (Journal of High Energy Physics, (2016), 2016, 11, (47), 10.1007/JHEP11(2016)047)
LHCb Collaboration, 1 Apr 2017, In: Journal of High Energy Physics. 2017, 4, 142.
Research output: Contribution to journal › Comment/debate › peer-review

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@article{70e94e86373544b4b0d84dc9f13fe41f,

title = "Measurements of the S-wave fraction in B 0 → K + π − μ + μ − decays and the B 0 → K ∗(892)0 μ + μ − differential branching fraction",

abstract = "A measurement of the differential branching fraction of the decay B0 → K∗(892)0μ+μ− is presented together with a determination of the S-wave fraction of the K+π− system in the decay B0 → K+π−μ+μ−. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q2. Precise theoretical predictions for the differential branching fraction of B0 → K∗(892)0μ+μ− decays are available for the q2 region 1.1 < q2< 6.0 GeV2/c4. In this q2 region, for the K+π− invariant mass range 796 < mKπ< 996 MeV/c2, the S-wave fraction of the K+π− system in B0 → K+π−μ+μ− decays is found to be FS=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B0 → K∗(892)0μ+μ− decays is determined to be dℬ/dq2=(0.392−0.019 +0.020(stat)±0.010(syst)±0.027(norm))×10−7c4/GeV2. The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.",

keywords = "B physics, Hadron-Hadron scattering (experiments), Rare decay",

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi 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 G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and P. d{\textquoteright}Argent 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 S. Bifani and G. Chatzikonstantinidis and N. Farley and P. Griffith and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and L. Pescatore and A. Sergi and Watson, {N. K.} and T. Williams and Zarebski, {K. A.}",

year = "2016",

month = nov,

day = "8",

doi = "10.1007/JHEP11(2016)047",

language = "English",

volume = "2016",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "11",

}

TY - JOUR

T1 - Measurements of the S-wave fraction in B 0 → K + π − μ + μ − decays and the B 0 → K ∗(892)0 μ + μ − differential branching fraction

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

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 - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - d’Argent, P.

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 - Bifani, S.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Griffith, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Pescatore, L.

AU - Sergi, A.

AU - Watson, N. K.

AU - Williams, T.

AU - Zarebski, K. A.

PY - 2016/11/8

Y1 - 2016/11/8

N2 - A measurement of the differential branching fraction of the decay B0 → K∗(892)0μ+μ− is presented together with a determination of the S-wave fraction of the K+π− system in the decay B0 → K+π−μ+μ−. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q2. Precise theoretical predictions for the differential branching fraction of B0 → K∗(892)0μ+μ− decays are available for the q2 region 1.1 < q2< 6.0 GeV2/c4. In this q2 region, for the K+π− invariant mass range 796 < mKπ< 996 MeV/c2, the S-wave fraction of the K+π− system in B0 → K+π−μ+μ− decays is found to be FS=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B0 → K∗(892)0μ+μ− decays is determined to be dℬ/dq2=(0.392−0.019 +0.020(stat)±0.010(syst)±0.027(norm))×10−7c4/GeV2. The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.

AB - A measurement of the differential branching fraction of the decay B0 → K∗(892)0μ+μ− is presented together with a determination of the S-wave fraction of the K+π− system in the decay B0 → K+π−μ+μ−. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q2. Precise theoretical predictions for the differential branching fraction of B0 → K∗(892)0μ+μ− decays are available for the q2 region 1.1 < q2< 6.0 GeV2/c4. In this q2 region, for the K+π− invariant mass range 796 < mKπ< 996 MeV/c2, the S-wave fraction of the K+π− system in B0 → K+π−μ+μ− decays is found to be FS=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B0 → K∗(892)0μ+μ− decays is determined to be dℬ/dq2=(0.392−0.019 +0.020(stat)±0.010(syst)±0.027(norm))×10−7c4/GeV2. The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.

KW - B physics

KW - Hadron-Hadron scattering (experiments)

KW - Rare decay

UR - http://www.scopus.com/inward/record.url?scp=84994820110&partnerID=8YFLogxK

U2 - 10.1007/JHEP11(2016)047

DO - 10.1007/JHEP11(2016)047

M3 - Article

AN - SCOPUS:84994820110

SN - 1126-6708

VL - 2016

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 11

M1 - 47

ER -