Precision measurement of the mass and lifetime of the Ξ-<inf>b</inf> baryon

R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; 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; C. Baesso; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; V. Batozskaya; V. Battista; A. Bay; L. Beaucourt; J. Beddow; F. Bedeschi; I. Bediaga; S. Belogurov; K. Belous; I. Belyaev; E. Ben-Haim; G. Bencivenni; S. Benson; J. Benton; A. Berezhnoy; R. Bernet; M. O. Bettler; M. Van Beuzekom; A. Bien; S. Bifani; T. Bird; A. Bizzeti; P. M. Bjørnstad; T. Blake; F. Blanc; J. Blouw; S. Blusk; V. Bocci; A. Bondar; N. Bondar; W. Bonivento; S. Borghi; A. Borgia; M. Borsato; T. J.V. Bowcock; E. Bowen; C. Bozzi; T. Brambach; D. Brett; M. Britsch; T. Britton; J. Brodzicka; N. H. Brook; H. Brown; A. Bursche; J. Buytaert; S. Cadeddu; R. Calabrese; M. Calvi; M. Calvo Gomez

doi:10.1103/PhysRevLett.113.242002

Precision measurement of the mass and lifetime of the Ξ-<inf>b</inf> baryon

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. AndreassenM. 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, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, H. Brown, A. Bursche, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi, M. Calvo Gomez

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Abstract

We report on measurements of the mass and lifetime of the Ξ ^- _b baryon using about 1800 Ξ ^- _b decays reconstructed in a proton-proton collision data set corresponding to an integrated luminosity of 3.0 fb ^-1, collected by the LHCb experiment. The decays are reconstructed in the Ξ ^- _b → Ξ ⁰ _cπ ^-, Ξ ⁰ _c → pK ^-K ^-π ⁺, channel and the mass and lifetime are measured using the Λ ⁰ _b → Λ ⁺ _Cπ ^-, mode as a reference. We measure M (Ξ ^- _b) - M(Λ ⁰ _b)= 178.36 ± 0.46 ± 0.16 MeV=c ², (τξ ^- _B/τΛ ⁰ _b) = 1.089 ± 0.026 ± 0.011, where the uncertainties are statistical and systematic, respectively. These results lead to a factor of 2 better precision on the Ξ ^- _b mass and lifetime compared to previous best measurements, and are consistent with theoretical expectations.

Original language	English
Article number	242002
Pages (from-to)	1DUMMY
Number of pages	1
Journal	Physical Review Letters
Volume	113
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.113.242002
Publication status	Published - 1 Jan 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 CERN, for the LHCb Collaboration.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.113.242002

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84959854397&origin=inward

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Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., ... Calvo Gomez, M. (2014). Precision measurement of the mass and lifetime of the Ξ-<inf>b</inf> baryon. Physical Review Letters, 113(24), 1DUMMY. Article 242002. https://doi.org/10.1103/PhysRevLett.113.242002

@article{47414e77c1f245dc8c6d3ed10d0c8066,

title = "Precision measurement of the mass and lifetime of the Ξ-b baryon",

abstract = "We report on measurements of the mass and lifetime of the Ξ - b baryon using about 1800 Ξ - b decays reconstructed in a proton-proton collision data set corresponding to an integrated luminosity of 3.0 fb -1, collected by the LHCb experiment. The decays are reconstructed in the Ξ - b → Ξ 0 cπ -, Ξ 0 c → pK -K -π +, channel and the mass and lifetime are measured using the Λ 0 b → Λ + Cπ -, mode as a reference. We measure M (Ξ - b) - M(Λ 0 b)= 178.36 ± 0.46 ± 0.16 MeV=c 2, (τξ - B/τΛ 0 b) = 1.089 ± 0.026 ± 0.011, where the uncertainties are statistical and systematic, respectively. These results lead to a factor of 2 better precision on the Ξ - b mass and lifetime compared to previous best measurements, and are consistent with theoretical expectations. ",

author = "R. Aaij and B. Adeva and M. Adinolfi and A. Affolder 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 J. Anderson and R. Andreassen and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. 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 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 S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and Bettler, {M. O.} and {Van Beuzekom}, M. and A. Bien and S. Bifani and T. Bird and A. Bizzeti and Bj{\o}rnstad, {P. M.} and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and M. Borsato and Bowcock, {T. J.V.} and E. Bowen and C. Bozzi and T. Brambach and D. Brett and M. Britsch and T. Britton and J. Brodzicka and Brook, {N. H.} and H. Brown and A. Bursche and J. Buytaert and S. Cadeddu and R. Calabrese and M. Calvi and {Calvo Gomez}, M.",

year = "2014",

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language = "English",

volume = "113",

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journal = "Physical Review Letters",

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Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreassen, R, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bettler, MO, Van Beuzekom, M, Bien, A, Bifani, S, Bird, T, Bizzeti, A, Bjørnstad, PM, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Borsato, M, Bowcock, TJV, Bowen, E, Bozzi, C, Brambach, T, Brett, D, Britsch, M, Britton, T, Brodzicka, J, Brook, NH, Brown, H, Bursche, A, Buytaert, J, Cadeddu, S, Calabrese, R, Calvi, M & Calvo Gomez, M 2014, 'Precision measurement of the mass and lifetime of the Ξ-<inf>b</inf> baryon', Physical Review Letters, vol. 113, no. 24, 242002, pp. 1DUMMY. https://doi.org/10.1103/PhysRevLett.113.242002

TY - JOUR

T1 - Precision measurement of the mass and lifetime of the Ξ-b baryon

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

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 - Anderson, J.

AU - Andreassen, R.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

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 - 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 - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Berezhnoy, A.

AU - Bernet, R.

AU - Bettler, M. O.

AU - Van Beuzekom, M.

AU - Bien, A.

AU - Bifani, S.

AU - Bird, T.

AU - Bizzeti, A.

AU - Bjørnstad, P. M.

AU - Blake, T.

AU - Blanc, F.

AU - Blouw, J.

AU - Blusk, S.

AU - Bocci, V.

AU - Bondar, A.

AU - Bondar, N.

AU - Bonivento, W.

AU - Borghi, S.

AU - Borgia, A.

AU - Borsato, M.

AU - Bowcock, T. J.V.

AU - Bowen, E.

AU - Bozzi, C.

AU - Brambach, T.

AU - Brett, D.

AU - Britsch, M.

AU - Britton, T.

AU - Brodzicka, J.

AU - Brook, N. H.

AU - Brown, H.

AU - Bursche, A.

AU - Buytaert, J.

AU - Cadeddu, S.

AU - Calabrese, R.

AU - Calvi, M.

AU - Calvo Gomez, M.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - We report on measurements of the mass and lifetime of the Ξ - b baryon using about 1800 Ξ - b decays reconstructed in a proton-proton collision data set corresponding to an integrated luminosity of 3.0 fb -1, collected by the LHCb experiment. The decays are reconstructed in the Ξ - b → Ξ 0 cπ -, Ξ 0 c → pK -K -π +, channel and the mass and lifetime are measured using the Λ 0 b → Λ + Cπ -, mode as a reference. We measure M (Ξ - b) - M(Λ 0 b)= 178.36 ± 0.46 ± 0.16 MeV=c 2, (τξ - B/τΛ 0 b) = 1.089 ± 0.026 ± 0.011, where the uncertainties are statistical and systematic, respectively. These results lead to a factor of 2 better precision on the Ξ - b mass and lifetime compared to previous best measurements, and are consistent with theoretical expectations.

AB - We report on measurements of the mass and lifetime of the Ξ - b baryon using about 1800 Ξ - b decays reconstructed in a proton-proton collision data set corresponding to an integrated luminosity of 3.0 fb -1, collected by the LHCb experiment. The decays are reconstructed in the Ξ - b → Ξ 0 cπ -, Ξ 0 c → pK -K -π +, channel and the mass and lifetime are measured using the Λ 0 b → Λ + Cπ -, mode as a reference. We measure M (Ξ - b) - M(Λ 0 b)= 178.36 ± 0.46 ± 0.16 MeV=c 2, (τξ - B/τΛ 0 b) = 1.089 ± 0.026 ± 0.011, where the uncertainties are statistical and systematic, respectively. These results lead to a factor of 2 better precision on the Ξ - b mass and lifetime compared to previous best measurements, and are consistent with theoretical expectations.

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UR - http://www.scopus.com/inward/citedby.url?scp=84959854397&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevLett.113.242002

DO - 10.1103/PhysRevLett.113.242002

M3 - Article

SN - 0031-9007

VL - 113

SP - 1DUMMY

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

M1 - 242002

ER -

Precision measurement of the mass and lifetime of the Ξ<sup>-</sup><inf>b</inf> baryon

Abstract

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