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

The 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

The Lhcb Collaboration

Department of Physics

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

172 Scopus citations

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 (US)
Article number	47
Journal	Journal of High Energy Physics
Volume	2016
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2016)047
State	Published - Nov 1 2016

Keywords

B physics
Hadron-Hadron scattering (experiments)
Rare decay

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP11(2016)047

Cite this

@article{f3f9e3b9430343a19ce0be454adf6080,

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 = "{The 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 W. Barter and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and Bel, {L. J.} and S. Blusk and {Silva Coutinho}, R. and T. Skwarnicki and S. Stone",

note = "Publisher Copyright: {\textcopyright} 2016, The Author(s).",

year = "2016",

month = nov,

day = "1",

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

language = "English (US)",

volume = "2016",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

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 - The 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 - Barter, W.

AU - Batozskaya, V.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Bel, L. J.

AU - Blusk, S.

AU - Silva Coutinho, R.

AU - Skwarnicki, T.

AU - Stone, S.

PY - 2016/11/1

Y1 - 2016/11/1

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

UR - http://www.scopus.com/inward/citedby.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 -