Measurement of the CP-violating phase ϕs from Bs0→J/ψπ+π− decays in 13 TeV pp collisions
R. Aaij,C. Abellán Beteta,B. Adeva,M. Adinolfi, C.A. Aidala, Z. Ajaltouni,S. Akar,P. Albicocco,J. Albrecht, F. Alessio, M. Alexander,A. Alfonso Albero, G. Alkhazov,P. Alvarez Cartelle, A.A. Alves,S. Amato, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. Andreotti, J.E. Andrews,F. Archilli,J. Arnau Romeu,A. Artamonov,M. Artuso, K. Arzymatov, E. Aslanides,M. Atzeni, B. Audurier,S. Bachmann, J.J. Back, S. Baker,V. Balagura,W. Baldini,A. Baranov,R.J. Barlow, G.C. Barrand, S. Barsuk,W. Barter,M. Bartolini,F. Baryshnikov, V. Batozskaya, B. Batsukh, A. Battig, V. Battista, A. Bay,F. Bedeschi, I. Bediaga, A. Beiter, L.J. Bel,S. Belin,N. Beliy, V. Bellee, N. Belloli, K. Belous, I. Belyaev, G. Bencivenni, E. Ben-Haim,S. Benson,S. Beranek,A. Berezhnoy, R. Bernet, D. Berninghoff, E. Bertholet, A. Bertolin,C. Betancourt,F. Betti, M.O. Bettler,Ia. Bezshyiko,S. Bhasin, J. Bhom,M.S. Bieker,S. Bifani, P. Billoir, A. Birnkraut, A. Bizzeti,M. Bjørn,M.P. Blago,T. Blake,F. Blanc,S. Blusk, D. Bobulska,V. Bocci,O. Boente Garcia, T. Boettcher,A. Bondar, N. Bondar,S. Borghi,M. Borisyak,M. Borsato,M. Boubdir,T.J.V. Bowcock,C. Bozzi,S. Braun, M. Brodski,J. Brodzicka,A. Brossa Gonzalo,D. Brundu, E. Buchanan, A. Buonaura,C. Burr, A. Bursche, J. Buytaert,W. Byczynski,S. Cadeddu,H. Cai,R. Calabrese, R. Calladine,M. Calvi,M. Calvo Gomez,A. Camboni,P. Campana,D.H. Campora Perez,L. Capriotti,A. Carbone,G. Carboni,R. Cardinale, A. Cardini,P. Carniti,K. Carvalho Akiba,G. Casse,M. Cattaneo,G. Cavallero, R. Cenci,D. Chamont,M.G. Chapman,M. Charles,Ph. Charpentier,G. Chatzikonstantinidis, M. Chefdeville,V. Chekalina,C. Chen,S. Chen,S.-G. Chitic,V. Chobanova, M. Chrzaszcz, A. Chubykin, P. Ciambrone,X. Cid Vidal, G. Ciezarek,F. Cindolo, P.E.L. Clarke, M. Clemencic, H.V. Cliff, J. Closier,V. Coco,J.A.B. Coelho,J. Cogan, E. Cogneras,L. Cojocariu,P. Collins, T. Colombo, A. Comerma-Montells,A. Contu,G. Coombs, S. Coquereau,G. Corti,C.M. Costa Sobral, B. Couturier,G.A. Cowan,D.C. Craik, A. Crocombe,M. Cruz Torres,R. Currie,C.L. Da Silva,E. Dall'Occo,J. Dalseno, C. D'Ambrosio, A. Danilina, P. d'Argent,A. Davis,O. De Aguiar Francisco,K. De Bruyn,S. De Capua,M. De Cian,J.M. De Miranda,L. De Paula,M. De Serio,P. De Simone,J.A. de Vries, C.T. Dean,W. Dean, D. Decamp,L. Del Buono,B. Delaney,H.-P. Dembinski,M. Demmer, A. Dendek,D. Derkach,O. Deschamps, F. Desse,F. Dettori,B. Dey,A. Di Canto,P. Di Nezza,S. Didenko,H. Dijkstra,F. Dordei,M. Dorigo,A.C. dos Reis,A. Dosil Suárez, L. Douglas, A. Dovbnya,K. Dreimanis,L. Dufour, G. Dujany, P. Durante,J.M. Durham,D. Dutta, R. Dzhelyadin,M. Dziewiecki,A. Dziurda, A. Dzyuba, S. Easo,U. Egede,V. Egorychev,S. Eidelman,S. Eisenhardt, U. Eitschberger, R. Ekelhof, L. Eklund,S. Ely,A. Ene,S. Escher,S. Esen,T. Evans, A. Falabella, C. Färber, N. Farley, S. Farry,D. Fazzini,M. Féo,P. Fernandez Declara,A. Fernandez Prieto,F. Ferrari,L. Ferreira Lopes,F. Ferreira Rodrigues,S. Ferreres Sole, M. Ferro-Luzzi,S. Filippov, R.A. Fini,M. Fiorini,M. Firlej, C. 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Heß,J. Heuel, A. Hicheur,R. Hidalgo Charman,D. Hill,M. Hilton, P.H. Hopchev,J. Hu,W. Hu,W. Huang,Z.C. Huard,W. Hulsbergen,T. Humair,M. Hushchyn,D. Hutchcroft,D. Hynds,P. Ibis,M. Idzik,P. Ilten, A. Inglessi, A. Inyakin,K. Ivshin, R. Jacobsson,S. Jakobsen, J. Jalocha, E. Jans,B.K. Jashal,A. Jawahery,F. Jiang,M. John,D. Johnson, C.R. Jones, C. Joram,B. Jost,N. Jurik,S. Kandybei, M. Karacson, J.M. Kariuki,S. Karodia,N. Kazeev,M. Kecke, F. Keizer,M. Kelsey,M. Kenzie,T. Ketel, B. Khanji, A. Kharisova, C. Khurewathanakul,K.E. Kim,T. Kirn,V.S. Kirsebom,S. Klaver,K. Klimaszewski,S. Koliiev, M. Kolpin,R. Kopecna,P. Koppenburg,I. Kostiuk,S. Kotriakhova, M. Kozeiha, L. Kravchuk, M. Kreps, F. Kress, S. Kretzschmar,P. Krokovny,W. Krupa,W. Krzemien,W. Kucewicz, M. Kucharczyk,V. Kudryavtsev,G.J. Kunde,A.K. Kuonen, T. Kvaratskheliya, D. Lacarrere, G. Lafferty,A. Lai, D. Lancierini, G. Lanfranchi, C. Langenbruch,T. Latham,C. Lazzeroni,R. Le Gac,R. Lefèvre, A. Leflat,F. Lemaitre,O. Leroy,T. Lesiak, B. 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Xu,Z. Xu, Z. Yang,Y. Yao,L.E. Yeomans, H. Yin,J. Yu,X. Yuan, O. Yushchenko,K.A. Zarebski,M. Zavertyaev,M. Zeng,D. Zhang, L. Zhang,W.C. Zhang,Y. Zhang, A. Zhelezov,Y. Zheng,X. Zhu,V. Zhukov, J.B. Zonneveld,S. Zucchelli
PHYSICS LETTERS B（2019）
引用 64|浏览68
摘要
Decays of B-s(0) and (B) over bar (0)(s) mesons into J/psi pi(+)pi(-) final states are studied in a data sample corresponding to 1.9 fb(-1) of integrated luminosity collected with the LHCb detector in 13 TeV pp collisions. A time-dependent amplitude analysis is used to determine the final-state resonance contributions, the CP-violating phase phi(s) = -0.057 +/- 0.060 +/- 0.011 rad, the decay-width difference between the heavier mass B-s(0) eigenstate and the B-0 meson of -0.050 +/- 0.004 +/- 0.004 ps(-1), and the CP-violating parameter vertical bar lambda vertical bar = 1.01(-0.06)(+0.08) +/- 0.03, where the first uncertainty is statistical and the second systematic. These results are combined with previous LHCb measurements in the same decay channel using 7 TeV and 8 TeV pp collisions obtaining phi(s) = 0.002 +/- 0.044 +/- 0.012 rad, and vertical bar lambda vertical bar = 0.949 +/- 0.036 +/- 0.019. (C) 2019 The Author. Published by Elsevier B.V.
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