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@article{Aaij:2019:epjc/s10052-019-7159-8,
author = {Aaij, R and Beteta, CA and Ackernley, T and Adeva, B and Adinolfi, M and Afsharnia, H and Aidala, CA and Aiola, S and Ajaltouni, Z and Akar, S and Albicocco, P and Albrecht, J and Alessio, F and Alexander, M and Albero, AA and Alkhazov, G and Cartelle, PA and Jr, AAA and Amato, S and Amhis, Y and An, L and Anderlini, L and Andreassi, G and Andreotti, M and Archilli, F and d'Argent, P and Romeu, JA and Artamonov, A and Artuso, M and Arzymatov, K and Aslanides, E and Atzeni, M and Audurier, B and Bachmann, S and Back, JJ and Baker, S and Balagura, V and Baldini, W and Baranov, A and Barlow, RJ and Barsuk, S and Barter, W and Bartolini, M and Baryshnikov, F and Bassi, G and Batozskaya, V and Batsukh, B and Battig, A and Battista, V and Bay, A and Becker, M and Bedeschi, F and Bediaga, I and Beiter, A and Bel, LJ and Belavin, V and Belin, S and Beliy, N and Bellee, V and Belous, K and Belyaev, I and Ben-Haim, E and Bencivenni, G and Benson, S and Beranek, S and Berezhnoy, A and Bernet, R a},
doi = {epjc/s10052-019-7159-8},
journal = {European Physical Journal C: Particles and Fields},
title = {Updated measurement of time-dependent   CP -violating observables in   Bs→J/ψK+K−  decays},
url = {http://dx.doi.org/10.1140/epjc/s10052-019-7159-8},
volume = {79},
year = {2019}
}

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TY  - JOUR
AB  - The decay-time-dependent   CP  asymmetry in   B0s→J/ψK+K−  decays is measured using proton–proton collision data, corresponding to an integrated luminosity of   1.9fb−1 , collected with the LHCb detector at a centre-of-mass energy of   13TeV  in 2015 and 2016. Using a sample of approximately 117 000 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   B0s -  B¯¯¯¯0s  system,   ΔΓs . The difference of the average   B0s  and   B0  meson decay widths,   Γs−Γd , is determined using in addition a sample of   B0→J/ψK+π−  decays. The values obtained are   s=−0.083±0.041±0.006rad ,   ΔΓs=0.077±0.008±0.003ps−1  and   Γs−Γd=−0.0041±0.0024±0.0015ps−1 , where the first uncertainty is statistical and the second systematic. These are the most precise single measurements of these quantities to date and are consistent with expectations based on the Standard Model and with a previous LHCb analysis of this decay using data recorded at centre-of-mass energies 7 and 8 TeV. Finally, the results are combined with recent results from   B0s→J/ψπ+π−  decays obtained using the same dataset as this analysis, and with previous independent LHCb results.
AU  - Aaij,R
AU  - Beteta,CA
AU  - Ackernley,T
AU  - Adeva,B
AU  - Adinolfi,M
AU  - Afsharnia,H
AU  - Aidala,CA
AU  - Aiola,S
AU  - Ajaltouni,Z
AU  - Akar,S
AU  - Albicocco,P
AU  - Albrecht,J
AU  - Alessio,F
AU  - Alexander,M
AU  - Albero,AA
AU  - Alkhazov,G
AU  - Cartelle,PA
AU  - Jr,AAA
AU  - Amato,S
AU  - Amhis,Y
AU  - An,L
AU  - Anderlini,L
AU  - Andreassi,G
AU  - Andreotti,M
AU  - Archilli,F
AU  - d'Argent,P
AU  - Romeu,JA
AU  - Artamonov,A
AU  - Artuso,M
AU  - Arzymatov,K
AU  - Aslanides,E
AU  - Atzeni,M
AU  - Audurier,B
AU  - Bachmann,S
AU  - Back,JJ
AU  - Baker,S
AU  - Balagura,V
AU  - Baldini,W
AU  - Baranov,A
AU  - Barlow,RJ
AU  - Barsuk,S
AU  - Barter,W
AU  - Bartolini,M
AU  - Baryshnikov,F
AU  - Bassi,G
AU  - Batozskaya,V
AU  - Batsukh,B
AU  - Battig,A
AU  - Battista,V
AU  - Bay,A
AU  - Becker,M
AU  - Bedeschi,F
AU  - Bediaga,I
AU  - Beiter,A
AU  - Bel,LJ
AU  - Belavin,V
AU  - Belin,S
AU  - Beliy,N
AU  - Bellee,V
AU  - Belous,K
AU  - Belyaev,I
AU  - Ben-Haim,E
AU  - Bencivenni,G
AU  - Benson,S
AU  - Beranek,S
AU  - Berezhnoy,A
AU  - Bernet,R
AU  - Berninghoff,D
AU  - Bertholet,E
AU  - Bertolin,A
AU  - Betancourt,C
AU  - Betti,F
AU  - Bettler,MO
AU  - Beuzekom,MV
AU  - Bezshyiko,I
AU  - Bhasin,S
AU  - Bhom,J
AU  - Bieker,MS
AU  - Bifani,S
AU  - Billoir,P
AU  - Birnkraut,A
AU  - Bizzeti,A
AU  - Bjorn,M
AU  - Blago,MP
AU  - Blake,T
AU  - Blanc,F
AU  - Blusk,S
AU  - Bobulska,D
AU  - Bocci,V
AU  - Garcia,OB
AU  - Boettcher,T
AU  - Boldyrev,A
AU  - Bondar,A
AU  - Bondar,N
AU  - Borghi,S
AU  - Borisyak,M
AU  - Borsato,M
AU  - Borsuk,JT
AU  - Boubdir,M
AU  - Bowcock,TJV
AU  - Bozzi,C
AU  - Braun,S
AU  - Rodriguez,AB
AU  - Brodski,M
AU  - Brodzicka,J
AU  - Gonzalo,AB
AU  - Brundu,D
AU  - Buchanan,E
AU  - Buonaura,A
AU  - Burr,C
AU  - Bursche,A
AU  - Butter,JS
AU  - Buytaert,J
AU  - Byczynski,W
AU  - Cadeddu,S
AU  - Cai,H
AU  - Calabrese,R
AU  - Cali,S
AU  - Calladine,R
AU  - Calvi,M
AU  - Gomez,MC
AU  - Camboni,A
AU  - Campana,P
AU  - Perez,DHC
AU  - Capriotti,L
AU  - Carbone,A
AU  - Carboni,G
AU  - Cardinale,R
AU  - Cardini,A
AU  - Carniti,P
AU  - Akiba,KC
AU  - Vidal,AC
AU  - Casse,G
AU  - Cattaneo,M
AU  - Cavallero,G
AU  - Cenci,R
AU  - Cerasoli,J
AU  - Chapman,MG
AU  - Charles,M
AU  - Charpentier,P
AU  - Chatzikonstantinidis,G
AU  - Chefdeville,M
AU  - Chekalina,V
AU  - Chen,C
AU  - Chen,S
AU  - Chernov,A
AU  - Chitic,S-G
AU  - Chobanova,V
AU  - Chrzaszcz,M
AU  - Chubykin,A
AU  - Ciambrone,P
AU  - Cicala,MF
AU  - Vidal,XC
AU  - Ciezarek,G
AU  - Cindolo,F
AU  - Clarke,PEL
AU  - Clemencic,M
AU  - Cliff,HV
AU  - Closier,J
AU  - Cobbledick,JL
AU  - Coco,V
AU  - Coelho,JAB
AU  - Cogan,J
AU  - Cogneras,E
AU  - Cojocariu,L
AU  - Collins,P
AU  - Colombo,T
AU  - Comerma-Montells,A
AU  - Contu,A
AU  - Cooke,N
AU  - Coombs,G
AU  - Coquereau,S
AU  - Corti,G
AU  - Sobral,CMC
AU  - Couturier,B
AU  - Cowan,GA
AU  - Craik,DC
AU  - Crocombe,A
AU  - Torre
DO  - epjc/s10052-019-7159-8
PY  - 2019///
SN  - 1124-1861
TI  - Updated measurement of time-dependent   CP -violating observables in   Bs→J/ψK+K−  decays
T2  - European Physical Journal C: Particles and Fields
UR  - http://dx.doi.org/10.1140/epjc/s10052-019-7159-8
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000482401700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/73378
VL  - 79
ER  -

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