Measurement of the effective B-s(0) -> K+ K- lifetime

LHCb collaboration; Harry V Cliff

doi:10.1016/j.physletb.2012.08.033

Measurement of the effective B-s(0) -> K+ K- lifetime

LHCb collaboration, Harry V Cliff^*

^*Corresponding author for this work

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

Abstract

A precise determination of the effective B-s(0) -> K+ K- lifetime can be used to constrain contributions from physics beyond the Standard Model in the B-s(0) meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb(-1) of data recorded by the LHCb experiment, the effective B-s(0) -> K+ K- lifetime is measured as 1.455 +/- 0.046 (stat.) +/- 0.006 (syst.) ps. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	393-400
Number of pages	8
Journal	Physics Letters B
Volume	716
Issue number	3-5
DOIs	https://doi.org/10.1016/j.physletb.2012.08.033
Publication status	Published - 2 Oct 2012
Externally published	Yes

Keywords

Flavour physics
Lifetime
B physics
DECAY
TOOL

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10.1016/j.physletb.2012.08.033Licence: CC BY-NC-ND

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@article{7ec75cc35a20467488e84173d53a745e,

title = "Measurement of the effective B-s(0) -> K+ K- lifetime",

abstract = "A precise determination of the effective B-s(0) -> K+ K- lifetime can be used to constrain contributions from physics beyond the Standard Model in the B-s(0) meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb(-1) of data recorded by the LHCb experiment, the effective B-s(0) -> K+ K- lifetime is measured as 1.455 +/- 0.046 (stat.) +/- 0.006 (syst.) ps. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.",

keywords = "Flavour physics, Lifetime, B physics, DECAY, TOOL",

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} and Cliff, {Harry V}",

year = "2012",

month = oct,

day = "2",

doi = "10.1016/j.physletb.2012.08.033",

language = "English",

volume = "716",

pages = "393--400",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "3-5",

}

TY - JOUR

T1 - Measurement of the effective B-s(0) -> K+ K- lifetime

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

AU - Cliff, Harry V

PY - 2012/10/2

Y1 - 2012/10/2

N2 - A precise determination of the effective B-s(0) -> K+ K- lifetime can be used to constrain contributions from physics beyond the Standard Model in the B-s(0) meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb(-1) of data recorded by the LHCb experiment, the effective B-s(0) -> K+ K- lifetime is measured as 1.455 +/- 0.046 (stat.) +/- 0.006 (syst.) ps. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.

AB - A precise determination of the effective B-s(0) -> K+ K- lifetime can be used to constrain contributions from physics beyond the Standard Model in the B-s(0) meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb(-1) of data recorded by the LHCb experiment, the effective B-s(0) -> K+ K- lifetime is measured as 1.455 +/- 0.046 (stat.) +/- 0.006 (syst.) ps. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved.

KW - Flavour physics

KW - Lifetime

KW - B physics

KW - DECAY

KW - TOOL

U2 - 10.1016/j.physletb.2012.08.033

DO - 10.1016/j.physletb.2012.08.033

M3 - Article

SN - 0370-2693

VL - 716

SP - 393

EP - 400

JO - Physics Letters B

JF - Physics Letters B

IS - 3-5

ER -

Measurement of the effective B-s(0) -> K+ K- lifetime

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Keywords

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