First observation of (B)over-bar(s)(0) -> D-s2*X+mu(-)(nu)over-bar decays

LHCb collaboration; Sheldon L. Stone

doi:10.1016/j.physletb.2011.02.039

First observation of (B)over-bar(s)(0) -> D-s2*X+mu(-)(nu)over-bar decays

LHCb collaboration, Sheldon L. Stone^*

^*Corresponding author for this work

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

Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D+X mu(-)(nu) over bar and (B) over bar (0)(s) -> (DK+X)-K-0 mu(-)(nu) over bar are detected. Two structures are observed in the (DK+)-K-0 mass spectrum at masses consistent with the known D-s1(2536)(+) and D-s2*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D-s2*(+) state in B-s2*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	14-20
Number of pages	7
Journal	Physics Letters B
Volume	698
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2011.02.039
Publication status	Published - 28 Mar 2011
Externally published	Yes

Keywords

LHC
Semileptonic b decays
(B)over-bar(s)(0) meson

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@article{cdc4eaf2e97840db81dcf1e2bd278978,

title = "First observation of (B)over-bar(s)(0) -> D-s2*X+mu(-)(nu)over-bar decays",

abstract = "Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D+X mu(-)(nu) over bar and (B) over bar (0)(s) -> (DK+X)-K-0 mu(-)(nu) over bar are detected. Two structures are observed in the (DK+)-K-0 mass spectrum at masses consistent with the known D-s1(2536)(+) and D-s2*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D-s2*(+) state in B-s2*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.",

keywords = "LHC, Semileptonic b decays, (B)over-bar(s)(0) meson",

author = "R. Aaij and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and M. Agari and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and P.A. Cartelle and A.A. Alves and S. Amato and Y. Amhis and J. Amoraal and J. Anderson and R.A. Nobrega and R.B. Appleby and O.A. Gutierrez and A. Arefyev and L. Arrabito and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and D.S. Bailey and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and S. Basiladze and A. Bates and C. Bauer and T. Bauer and A. Bay and I. Bediaga and K. Belous and I. Belyaev and M. Benayoun and G. Bencivenni and R. Bernet and M.O. Bettler and {van Beuzekom}, M. and S. Bifani and A. Bizzeti and P.M. Bjornstad and T. Blake and F. Blanc and {van den Brand}, J. and {LHCb collaboration} and Stone, {Sheldon L.}",

year = "2011",

month = mar,

day = "28",

doi = "10.1016/j.physletb.2011.02.039",

language = "English",

volume = "698",

pages = "14--20",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - First observation of (B)over-bar(s)(0) -> D-s2*X+mu(-)(nu)over-bar decays

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Agari, M.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amhis, Y.

AU - Amoraal, J.

AU - Anderson, J.

AU - Nobrega, R.A.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Arefyev, A.

AU - Arrabito, L.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Bailey, D.S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R.J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Basiladze, S.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, T.

AU - Bay, A.

AU - Bediaga, I.

AU - Belous, K.

AU - Belyaev, I.

AU - Benayoun, M.

AU - Bencivenni, G.

AU - Bernet, R.

AU - Bettler, M.O.

AU - van Beuzekom, M.

AU - Bifani, S.

AU - Bizzeti, A.

AU - Bjornstad, P.M.

AU - Blake, T.

AU - Blanc, F.

AU - van den Brand, J.

AU - LHCb collaboration

AU - Stone, Sheldon L.

PY - 2011/3/28

Y1 - 2011/3/28

N2 - Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D+X mu(-)(nu) over bar and (B) over bar (0)(s) -> (DK+X)-K-0 mu(-)(nu) over bar are detected. Two structures are observed in the (DK+)-K-0 mass spectrum at masses consistent with the known D-s1(2536)(+) and D-s2*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D-s2*(+) state in B-s2*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

AB - Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D+X mu(-)(nu) over bar and (B) over bar (0)(s) -> (DK+X)-K-0 mu(-)(nu) over bar are detected. Two structures are observed in the (DK+)-K-0 mass spectrum at masses consistent with the known D-s1(2536)(+) and D-s2*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D-s2*(+) state in B-s2*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

KW - LHC

KW - Semileptonic b decays

KW - (B)over-bar(s)(0) meson

U2 - 10.1016/j.physletb.2011.02.039

DO - 10.1016/j.physletb.2011.02.039

M3 - Article

SN - 0370-2693

VL - 698

SP - 14

EP - 20

JO - Physics Letters B

JF - Physics Letters B

IS - 1

ER -

First observation of (B)over-bar(s)(0) -> D-s2*X+mu(-)(nu)over-bar decays

Abstract

Keywords

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