Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes

R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. Anderlini; J. Anderson; R. Andreassen; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; A. Badalov; V. Balagura; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; V. Batozskaya; Th. Bauer; A. Bay; J. Beddow; F. Bedeschi; I. Bediaga; S. Belogurov; K. Belous; I. Belyaev; E. Ben-Haim; G. Bencivenni; G. Onderwater; A. Pellegrino; LHCb Collaboration

doi:10.1007/JHEP04(2014)114

Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes

R. Aaij^*, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. Andreassen, M. Andreotti, J. E. AndrewsR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, Th. Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, G. Onderwater, A. Pellegrino, LHCb Collaboration

^*Corresponding author for this work

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Abstract

Measurements of b-hadron lifetimes are reported using p p collision data, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using the exclusive decays B+ -> J/psi K+, B-0 -> J/psi K* (892)(0), B-0 -> J/K-s(0), Lambda(0)(b) -> J/psi Lambda and B-s(0) -> J/psi phi the average decay times in these modes are measured to be

tau(B+) -> J/psi K+ = 1.637 +/- 0.004 +/- 0.003 p s,

tau(B0) -> J/psi K*(0) = 1.524 +/- 0.006 +/- 0.004 p s,

tau(0)(B) -> J/psi K-s(0) = 1.499 +/- 0.013 +/- 0.005 ps,

tau Lambda(0)(b) -> J/psi Lambda = 1.415 +/- 0.027 +/- 0.006 ps,

tau(0)(Bs) -> J/psi phi = 1.480 +/- 0.011 +/- 0.005 ps,

where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, Delta Gamma(d), to the average width, Gamma(d), in the B-0 system, Delta Gamma(d)/Gamma(d) = -0.044 +/- 0.025 +/- 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.

Original language	English
Article number	114
Number of pages	26
Journal	Journal of High Energy Physics
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2014)114
Publication status	Published - 16-Apr-2014

Keywords

Lifetime
Hadron-Hadron Scattering
B physics
Flavor physics
DECAYS
BEAUTY
QCD
DIFFERENCE
PARAMETERS
SYSTEM
TOOL

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Measurements of the B +, B 0, B0s meson Final publisher's version, 1.67 MBLicence: CC BY

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Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., Andreotti, M., ... LHCb Collaboration (2014). Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes. Journal of High Energy Physics, (4), Article 114. https://doi.org/10.1007/JHEP04(2014)114

@article{3c7186239c2941399c18bcf8c638de67,

title = "Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes",

abstract = "Measurements of b-hadron lifetimes are reported using p p collision data, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using the exclusive decays B+ -> J/psi K+, B-0 -> J/psi K* (892)(0), B-0 -> J/K-s(0), Lambda(0)(b) -> J/psi Lambda and B-s(0) -> J/psi phi the average decay times in these modes are measured to betau(B+) -> J/psi K+ = 1.637 +/- 0.004 +/- 0.003 p s,tau(B0) -> J/psi K*(0) = 1.524 +/- 0.006 +/- 0.004 p s,tau(0)(B) -> J/psi K-s(0) = 1.499 +/- 0.013 +/- 0.005 ps,tau Lambda(0)(b) -> J/psi Lambda = 1.415 +/- 0.027 +/- 0.006 ps,tau(0)(Bs) -> J/psi phi = 1.480 +/- 0.011 +/- 0.005 ps,where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, Delta Gamma(d), to the average width, Gamma(d), in the B-0 system, Delta Gamma(d)/Gamma(d) = -0.044 +/- 0.025 +/- 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.",

keywords = "Lifetime, Hadron-Hadron Scattering, B physics, Flavor physics, DECAYS, BEAUTY, QCD, DIFFERENCE, PARAMETERS, SYSTEM, TOOL",

author = "R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and Cartelle, {P. Alvarez} and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. Anderlini and J. Anderson and R. Andreassen and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and Gutierrez, {O. Aquines} and F. Archilli 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 V. Balagura and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and Th. Bauer and A. Bay and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and G. Onderwater and A. Pellegrino and {LHCb Collaboration}",

year = "2014",

month = apr,

day = "16",

doi = "10.1007/JHEP04(2014)114",

language = "English",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

number = "4",

}

Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Cartelle, PA, Alves, AA, Amato, S, Amerio, S, Amhis, Y, Anderlini, L, Anderson, J, Andreassen, R, Andreotti, M, Andrews, JE, Appleby, RB, Gutierrez, OA, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Balagura, V, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Bauer, T, Bay, A, Beddow, J, Bedeschi, F, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Onderwater, G, Pellegrino, A & LHCb Collaboration 2014, 'Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes', Journal of High Energy Physics, no. 4, 114. https://doi.org/10.1007/JHEP04(2014)114

TY - JOUR

T1 - Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, R.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Gutierrez, O. Aquines

AU - Archilli, F.

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 - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Bauer, Th.

AU - Bay, A.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Bencivenni, G.

AU - Onderwater, G.

AU - Pellegrino, A.

AU - LHCb Collaboration

PY - 2014/4/16

Y1 - 2014/4/16

N2 - Measurements of b-hadron lifetimes are reported using p p collision data, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using the exclusive decays B+ -> J/psi K+, B-0 -> J/psi K* (892)(0), B-0 -> J/K-s(0), Lambda(0)(b) -> J/psi Lambda and B-s(0) -> J/psi phi the average decay times in these modes are measured to betau(B+) -> J/psi K+ = 1.637 +/- 0.004 +/- 0.003 p s,tau(B0) -> J/psi K*(0) = 1.524 +/- 0.006 +/- 0.004 p s,tau(0)(B) -> J/psi K-s(0) = 1.499 +/- 0.013 +/- 0.005 ps,tau Lambda(0)(b) -> J/psi Lambda = 1.415 +/- 0.027 +/- 0.006 ps,tau(0)(Bs) -> J/psi phi = 1.480 +/- 0.011 +/- 0.005 ps,where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, Delta Gamma(d), to the average width, Gamma(d), in the B-0 system, Delta Gamma(d)/Gamma(d) = -0.044 +/- 0.025 +/- 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.

AB - Measurements of b-hadron lifetimes are reported using p p collision data, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using the exclusive decays B+ -> J/psi K+, B-0 -> J/psi K* (892)(0), B-0 -> J/K-s(0), Lambda(0)(b) -> J/psi Lambda and B-s(0) -> J/psi phi the average decay times in these modes are measured to betau(B+) -> J/psi K+ = 1.637 +/- 0.004 +/- 0.003 p s,tau(B0) -> J/psi K*(0) = 1.524 +/- 0.006 +/- 0.004 p s,tau(0)(B) -> J/psi K-s(0) = 1.499 +/- 0.013 +/- 0.005 ps,tau Lambda(0)(b) -> J/psi Lambda = 1.415 +/- 0.027 +/- 0.006 ps,tau(0)(Bs) -> J/psi phi = 1.480 +/- 0.011 +/- 0.005 ps,where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, Delta Gamma(d), to the average width, Gamma(d), in the B-0 system, Delta Gamma(d)/Gamma(d) = -0.044 +/- 0.025 +/- 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.

KW - Lifetime

KW - Hadron-Hadron Scattering

KW - B physics

KW - Flavor physics

KW - DECAYS

KW - BEAUTY

KW - QCD

KW - DIFFERENCE

KW - PARAMETERS

KW - SYSTEM

KW - TOOL

U2 - 10.1007/JHEP04(2014)114

DO - 10.1007/JHEP04(2014)114

M3 - Article

SN - 1029-8479

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 4

M1 - 114

ER -

Measurements of the B+, B-0, B-s(0) meson and Lambda(0)(b) baryon lifetimes

Abstract

Keywords

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