Precision measurement of the Ξ-bbaryon lifetime

The LHCb Collaboration

doi:10.1103/PhysRevD.110.072002

Precision measurement of the Ξ^-_bbaryon lifetime

The LHCb Collaboration

School of Physics and Astronomy

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2 Citations (Scopus)

Abstract

A sample of pp collision data, corresponding to an integrated luminosity of 5.5 fb-1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 1.076 ± 0.013 ± 0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

Original language	English
Article number	072002
Number of pages	16
Journal	Physical Review D
Volume	110
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.110.072002
Publication status	Published - 3 Oct 2024

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10.1103/PhysRevD.110.072002Licence: CC BY

Cite this

@article{d14844b715634230a07672db31f88380,

title = "Precision measurement of the Ξ-bbaryon lifetime",

abstract = "A sample of pp collision data, corresponding to an integrated luminosity of 5.5 fb-1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 1.076 ± 0.013 ± 0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.",

author = "R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and Z. Aliouche and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and A. Anelli and D. Ao and F. Archilli and M. Argenton and \{Arguedas Cuendis\}, S. and A. Artamonov and M. Artuso and E. Aslanides and \{Ataide Da Silva\}, R. and M. Atzeni and B. Audurier and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and \{Baladron Rodriguez\}, P. and V. Balagura and W. Baldini and H. Bao and \{Baptista De Souza Leite\}, J. and M. Barbetti and Barbosa, \{I. R.\} and Barlow, \{R. J.\} and M. Barnyakov and S. Barsuk and W. Barter and M. Bartolini and J. Bartz and Basels, \{J. M.\} and G. Bassi and B. Batsukh and A. Bay and A. Beck and M. Becker and F. Bedeschi and Bediaga, \{I. B.\} and S. Belin and V. Bellee and K. Belous and I. Belov and I. Belyaev and G. Benane and G. Bencivenni and E. Ben-Haim and A. Berezhnoy and R. Bernet and \{Bernet Andres\}, S. and A. Bertolin and C. Betancourt and F. Betti and J. Bex and Ia Bezshyiko and J. Bhom and Bieker, \{M. S.\} and Biesuz, \{N. V.\} and P. Billoir and A. Biolchini and M. Birch and Bishop, \{F. C.R.\} and A. Bitadze and A. Bizzeti and T. Blake and F. Blanc and Blank, \{J. E.\} and S. Blusk and V. Bocharnikov and Boelhauve, \{J. A.\} and \{Boente Garcia\}, O. and T. Boettcher and A. Bohare and A. Boldyrev and Bolognani, \{C. S.\} and R. Bolzonella and N. Bondar and F. Borgato and S. Borghi and M. Borsato and Borsuk, \{J. T.\} and Bouchiba, \{S. A.\} and Bowcock, \{T. J.V.\} and A. Boyer and C. Bozzi and \{Brea Rodriguez\}, A. and N. Breer and J. Brodzicka and \{Brossa Gonzalo\}, A. and J. Brown and D. Brundu and E. Buchanan and A. Buonaura and L. Buonincontri and Burke, \{A. T.\} and C. Burr and A. Butkevich and Butter, \{J. S.\} and J. Buytaert and W. Byczynski and S. Cadeddu and H. Cai and R. Calabrese and \{Calderon Ramirez\}, S. and L. Calefice and S. Cali and M. Calvi and \{Calvo Gomez\}, M. and \{Camargo Magalhaes\}, P. and \{Cambon Bouzas\}, \{J. I.\} and P. Campana and \{Campora Perez\}, \{D. H.\} and \{Campoverde Quezada\}, \{A. F.\} and S. Capelli and L. Capriotti and R. Caravaca-Mora and A. Carbone and \{Carcedo Salgado\}, L. and R. Cardinale and A. Cardini and P. Carniti and L. Carus and \{Casais Vidal\}, A. and R. Caspary and G. Casse and \{Castro Godinez\}, J. and M. Cattaneo and G. Cavallero and V. Cavallini and S. Celani and D. Cervenkov and S. Cesare and Chadwick, \{A. J.\} and I. Chahrour and M. Charles and Ph Charpentier and E. Chatzianagnostou and \{Chavez Barajas\}, \{C. A.\} and M. Chefdeville and C. Chen and S. Chen and Z. Chen and A. Chernov and S. Chernyshenko and V. Chobanova and S. Cholak and M. Chrzaszcz and A. Chubykin and V. Chulikov and P. Ciambrone and \{Cid Vidal\}, X. and G. Ciezarek and P. Cifra and Clarke, \{P. E.L.\} and M. Clemencic and Cliff, \{H. V.\} and J. Closier and \{Cocha Toapaxi\}, C. and V. Coco and J. Cogan and E. Cogneras and L. Cojocariu and P. Collins and T. Colombo and A. Comerma-Montells and L. Congedo and A. Contu and N. Cooke and I. Corredoira and A. Correia and G. Corti and \{Cottee Meldrum\}, \{J. J.\} and B. Couturier and Craik, \{D. C.\} and \{Cruz Torres\}, M. and \{Curras Rivera\}, E. and R. Currie and \{Da Silva\}, \{C. L.\} and S. Dadabaev and L. Dai and X. Dai and E. Dall'Occo and J. Dalseno and C. D'Ambrosio and J. Daniel and A. Danilina and P. D'Argent and A. Davidson and Davies, \{J. E.\} and A. Davis and \{De Aguiar Francisco\}, O. and \{De Angelis\}, C. and \{De Benedetti\}, F. and \{De Boer\}, J. and \{De Bruyn\}, K. and \{De Capua\}, S. and \{De Cian\}, M. and \{De Freitas Carneiro Da Graca\}, U. and \{De Lucia\}, E. and \{De Miranda\}, \{J. M.\} and \{De Paula\}, L. and \{De Serio\}, M. and \{De Simone\}, P. and \{De Vellis\}, F. and \{De Vries\}, \{J. A.\} and F. Debernardis and D. Decamp and V. Dedu and \{Del Buono\}, L. and B. Delaney and Dembinski, \{H. P.\} and U. Egede and Y. Fujii and T. Hadavizadeh and Henderson, \{R. D.L.\} and Lane, \{J. J.\} and M. Monk and R. Song and Walton, \{E. J.\} and Ward, \{J. A.\} and M. Williams and Liu, \{F. L.\} and \{The LHCb Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2024 CERN, for the LHCb Collaboration.",

year = "2024",

month = oct,

day = "3",

doi = "10.1103/PhysRevD.110.072002",

language = "English",

volume = "110",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "7",

}

TY - JOUR

T1 - Precision measurement of the Ξ-bbaryon lifetime

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Ataide Da Silva, R.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Baldini, W.

AU - Bao, H.

AU - Baptista De Souza Leite, J.

AU - Barbetti, M.

AU - Barbosa, I. R.

AU - Barlow, R. J.

AU - Barnyakov, M.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Bartz, J.

AU - Basels, J. M.

AU - Bassi, G.

AU - Batsukh, B.

AU - Bay, A.

AU - Beck, A.

AU - Becker, M.

AU - Bedeschi, F.

AU - Bediaga, I. B.

AU - Belin, S.

AU - Bellee, V.

AU - Belous, K.

AU - Belov, I.

AU - Belyaev, I.

AU - Benane, G.

AU - Bencivenni, G.

AU - Ben-Haim, E.

AU - Berezhnoy, A.

AU - Bernet, R.

AU - Bernet Andres, S.

AU - Bertolin, A.

AU - Betancourt, C.

AU - Betti, F.

AU - Bex, J.

AU - Bezshyiko, Ia

AU - Bhom, J.

AU - Bieker, M. S.

AU - Biesuz, N. V.

AU - Billoir, P.

AU - Biolchini, A.

AU - Birch, M.

AU - Bishop, F. C.R.

AU - Bitadze, A.

AU - Bizzeti, A.

AU - Blake, T.

AU - Blanc, F.

AU - Blank, J. E.

AU - Blusk, S.

AU - Bocharnikov, V.

AU - Boelhauve, J. A.

AU - Boente Garcia, O.

AU - Boettcher, T.

AU - Bohare, A.

AU - Boldyrev, A.

AU - Bolognani, C. S.

AU - Bolzonella, R.

AU - Bondar, N.

AU - Borgato, F.

AU - Borghi, S.

AU - Borsato, M.

AU - Borsuk, J. T.

AU - Bouchiba, S. A.

AU - Bowcock, T. J.V.

AU - Boyer, A.

AU - Bozzi, C.

AU - Brea Rodriguez, A.

AU - Breer, N.

AU - Brodzicka, J.

AU - Brossa Gonzalo, A.

AU - Brown, J.

AU - Brundu, D.

AU - Buchanan, E.

AU - Buonaura, A.

AU - Buonincontri, L.

AU - Burke, A. T.

AU - Burr, C.

AU - Butkevich, A.

AU - Butter, J. S.

AU - Buytaert, J.

AU - Byczynski, W.

AU - Cadeddu, S.

AU - Cai, H.

AU - Calabrese, R.

AU - Calderon Ramirez, S.

AU - Calefice, L.

AU - Cali, S.

AU - Calvi, M.

AU - Calvo Gomez, M.

AU - Camargo Magalhaes, P.

AU - Cambon Bouzas, J. I.

AU - Campana, P.

AU - Campora Perez, D. H.

AU - Campoverde Quezada, A. F.

AU - Capelli, S.

AU - Capriotti, L.

AU - Caravaca-Mora, R.

AU - Carbone, A.

AU - Carcedo Salgado, L.

AU - Cardinale, R.

AU - Cardini, A.

AU - Carniti, P.

AU - Carus, L.

AU - Casais Vidal, A.

AU - Caspary, R.

AU - Casse, G.

AU - Castro Godinez, J.

AU - Cattaneo, M.

AU - Cavallero, G.

AU - Cavallini, V.

AU - Celani, S.

AU - Cervenkov, D.

AU - Cesare, S.

AU - Chadwick, A. J.

AU - Chahrour, I.

AU - Charles, M.

AU - Charpentier, Ph

AU - Chatzianagnostou, E.

AU - Chavez Barajas, C. A.

AU - Chefdeville, M.

AU - Chen, C.

AU - Chen, S.

AU - Chen, Z.

AU - Chernov, A.

AU - Chernyshenko, S.

AU - Chobanova, V.

AU - Cholak, S.

AU - Chrzaszcz, M.

AU - Chubykin, A.

AU - Chulikov, V.

AU - Ciambrone, P.

AU - Cid Vidal, X.

AU - Ciezarek, G.

AU - Cifra, P.

AU - Clarke, P. E.L.

AU - Clemencic, M.

AU - Cliff, H. V.

AU - Closier, J.

AU - Cocha Toapaxi, C.

AU - Coco, V.

AU - Cogan, J.

AU - Cogneras, E.

AU - Cojocariu, L.

AU - Collins, P.

AU - Colombo, T.

AU - Comerma-Montells, A.

AU - Congedo, L.

AU - Contu, A.

AU - Cooke, N.

AU - Corredoira, I.

AU - Correia, A.

AU - Corti, G.

AU - Cottee Meldrum, J. J.

AU - Couturier, B.

AU - Craik, D. C.

AU - Cruz Torres, M.

AU - Curras Rivera, E.

AU - Currie, R.

AU - Da Silva, C. L.

AU - Dadabaev, S.

AU - Dai, L.

AU - Dai, X.

AU - Dall'Occo, E.

AU - Dalseno, J.

AU - D'Ambrosio, C.

AU - Daniel, J.

AU - Danilina, A.

AU - D'Argent, P.

AU - Davidson, A.

AU - Davies, J. E.

AU - Davis, A.

AU - De Aguiar Francisco, O.

AU - De Angelis, C.

AU - De Benedetti, F.

AU - De Boer, J.

AU - De Bruyn, K.

AU - De Capua, S.

AU - De Cian, M.

AU - De Freitas Carneiro Da Graca, U.

AU - De Lucia, E.

AU - De Miranda, J. M.

AU - De Paula, L.

AU - De Serio, M.

AU - De Simone, P.

AU - De Vellis, F.

AU - De Vries, J. A.

AU - Debernardis, F.

AU - Decamp, D.

AU - Dedu, V.

AU - Del Buono, L.

AU - Delaney, B.

AU - Dembinski, H. P.

AU - Egede, U.

AU - Fujii, Y.

AU - Hadavizadeh, T.

AU - Henderson, R. D.L.

AU - Lane, J. J.

AU - Monk, M.

AU - Song, R.

AU - Walton, E. J.

AU - Ward, J. A.

AU - Williams, M.

AU - Liu, F. L.

AU - The LHCb Collaboration

PY - 2024/10/3

Y1 - 2024/10/3

N2 - A sample of pp collision data, corresponding to an integrated luminosity of 5.5 fb-1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 1.076 ± 0.013 ± 0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

AB - A sample of pp collision data, corresponding to an integrated luminosity of 5.5 fb-1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 1.076 ± 0.013 ± 0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

UR - https://www.scopus.com/pages/publications/85212397859

U2 - 10.1103/PhysRevD.110.072002

DO - 10.1103/PhysRevD.110.072002

M3 - Article

AN - SCOPUS:85212397859

SN - 2470-0010

VL - 110

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 072002

ER -

Precision measurement of the Ξ-bbaryon lifetime

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Precision measurement of the Ξ^-_bbaryon lifetime