@article{Aaij:2024:10.1103/PhysRevLett.132.051802,
author = {Aaij, R and Abdelmotteleb, ASW and Abellan, Beteta C and Abudinén, F and Ackernley, T and Adeva, B and Adinolfi, M and Adlarson, P and Afsharnia, H and Agapopoulou, C and Aidala, CA and Ajaltouni, Z and Akar, S and Akiba, K and Albicocco, P and Albrecht, J and Alessio, F and Alexander, M and Alfonso, Albero A and Aliouche, Z and Alvarez, Cartelle P and Amalric, R and Amato, S and Amey, JL and Amhis, Y and An, L and Anderlini, L and Andersson, M and Andreianov, A and Andreola, P and Andreotti, M and Andreou, D and Ao, D and Archilli, F and Artamonov, A and Artuso, M and Aslanides, E and Atzeni, M and Audurier, B and Bacher, D and Bachiller, Perea I and Bachmann, S and Bachmayer, M and Back, JJ and Bailly-Reyre, A and Baladron, Rodriguez P and Balagura, V and Baldini, W and Baptista, de Souza Leite J and Barbetti, M and Barbosa, IR and Barlow, RJ and Barsuk, S and Barter, W and Bartolini, M and Baryshnikov, F and Basels, JM and Bassi, G and Batsukh, B and Battig, A and Bay, A and Beck, A},
doi = {10.1103/PhysRevLett.132.051802},
journal = {Phys Rev Lett},
title = {Improved Measurement of CP Violation Parameters in B_(s)^(0)→J/ψK^(+)K^(-) Decays in the Vicinity of the (1020) Resonance.},
url = {http://dx.doi.org/10.1103/PhysRevLett.132.051802},
volume = {132},
year = {2024}
}

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TY  - JOUR
AB  - The decay-time-dependent CP asymmetry in B_{s}^{0}→J/ψ(→μ^{+}μ^{-})K^{+}K^{-} decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 6  fb^{-1}, collected with the LHCb detector at a center-of-mass energy of 13 TeV. Using a sample of approximately 349 000 B_{s}^{0} signal decays with an invariant K^{+}K^{-} mass in the vicinity of the (1020) resonance, the CP-violating phase _{s} is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the B_{s}^{0}-B[over ¯]_{s}^{0} system, ΔΓ_{s}, and the difference of the average B_{s}^{0} and B^{0} meson decay widths, Γ_{s}-Γ_{d}. The values obtained are _{s}=-0.039±0.022±0.006  rad, ΔΓ_{s}=0.0845±0.0044±0.0024  ps^{-1}, and Γ_{s}-Γ_{d}=-0.0056_{-0.0015}^{+0.0013}±0.0014  ps^{-1}, where the first uncertainty is statistical and the second systematic. These are the most precise single measurements to date and are consistent with expectations based on the Standard Model and with the previous LHCb analyses of this decay. These results are combined with previous independent LHCb measurements. The phase _{s} is also measured independently for each polarization state of the K^{+}K^{-} system and shows no evidence for polarization dependence.
AU  - Aaij,R
AU  - Abdelmotteleb,ASW
AU  - Abellan,Beteta C
AU  - Abudinén,F
AU  - Ackernley,T
AU  - Adeva,B
AU  - Adinolfi,M
AU  - Adlarson,P
AU  - Afsharnia,H
AU  - Agapopoulou,C
AU  - Aidala,CA
AU  - Ajaltouni,Z
AU  - Akar,S
AU  - Akiba,K
AU  - Albicocco,P
AU  - Albrecht,J
AU  - Alessio,F
AU  - Alexander,M
AU  - Alfonso,Albero A
AU  - Aliouche,Z
AU  - Alvarez,Cartelle P
AU  - Amalric,R
AU  - Amato,S
AU  - Amey,JL
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  - Ao,D
AU  - Archilli,F
AU  - Artamonov,A
AU  - Artuso,M
AU  - Aslanides,E
AU  - Atzeni,M
AU  - Audurier,B
AU  - Bacher,D
AU  - Bachiller,Perea I
AU  - Bachmann,S
AU  - Bachmayer,M
AU  - Back,JJ
AU  - Bailly-Reyre,A
AU  - Baladron,Rodriguez P
AU  - Balagura,V
AU  - Baldini,W
AU  - Baptista,de Souza Leite J
AU  - Barbetti,M
AU  - Barbosa,IR
AU  - Barlow,RJ
AU  - Barsuk,S
AU  - Barter,W
AU  - Bartolini,M
AU  - Baryshnikov,F
AU  - Basels,JM
AU  - Bassi,G
AU  - Batsukh,B
AU  - Battig,A
AU  - Bay,A
AU  - Beck,A
AU  - Becker,M
AU  - Bedeschi,F
AU  - Bediaga,IB
AU  - Beiter,A
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  - Berninghoff,D
AU  - Bernstein,HC
AU  - Bertella,C
AU  - Bertolin,A
AU  - Betancourt,C
AU  - Betti,F
AU  - Bex,J
AU  - Bezshyiko,I
AU  - Bhom,J
AU  - Bian,L
AU  - Bieker,MS
AU  - Biesuz,NV
AU  - Billoir,P
AU  - Biolchini,A
AU  - Birch,M
AU  - Bishop,FCR
AU  - Bitadze,A
AU  - Bizzeti,A
AU  - Blago,MP
AU  - Blake,T
AU  - Blanc,F
AU  - Blank,JE
AU  - Blusk,S
AU  - Bobulska,D
AU  - Bocharnikov,V
AU  - Boelhauve,JA
AU  - Boente,Garcia O
AU  - Boettcher,T
AU  - Bohare,A
AU  - Boldyrev,A
AU  - Bolognani,CS
AU  - Bolzonella,R
AU  - Bondar,N
AU  - Borgato,F
AU  - Borghi,S
AU  - Borsato,M
AU  - Borsuk,JT
AU  - Bouchiba,SA
AU  - Bowcock,TJV
AU  - Boyer,A
AU  - Bozzi,C
AU  - Bradley,MJ
AU  - Braun,S
AU  - Brea,Rodriguez A
AU  - Breer,N
AU  - Brodzicka,J
AU  - Brossa,Gonzalo A
AU  - Brown,J
AU  - Brundu,D
AU  - Buonaura,A
AU  - Buonincontri,L
AU  - Burke,AT
AU  - Burr,C
AU  - Bursche,A
AU  - Butkevich,A
AU  - Butter,JS
AU  - Buytaert,J
AU  - Byczynski,W
AU  - Cadeddu,S
AU  - Cai,H
AU  - Calabrese,R
AU  - Calefice,L
AU  - Cali,S
AU  - Calvi,M
AU  - Calvo,Gomez M
AU  - Cambon,Bouzas J
AU  - Campana,P
AU  - Campora,Perez DH
AU  - Campoverde,Quezada AF
AU  - Capelli,S
AU  - Capriotti,L
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  - Cattaneo,M
AU  - Cavallero,G
AU  - Cavallini,V
AU  - Celani,S
AU  - Cerasoli,J
AU  - Cervenkov,D
AU  - Chadwick,AJ
AU  - Chahrour,I
AU  - Chapman,MG
AU  - Charles,M
AU  - Charp
DO  - 10.1103/PhysRevLett.132.051802
PY  - 2024///
TI  - Improved Measurement of CP Violation Parameters in B_{s}^{0}→J/ψK^{+}K^{-} Decays in the Vicinity of the (1020) Resonance.
T2  - Phys Rev Lett
UR  - http://dx.doi.org/10.1103/PhysRevLett.132.051802
UR  - https://www.ncbi.nlm.nih.gov/pubmed/38364143
VL  - 132
ER  - 

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