Updated measurement of time-dependent CP -violating observables in Bs0→J/ψK+ K- decays
2019
- Roel Aaij
- C. Abellan Beteta
- Thomas Ackernley
- Bernardo Adeva
- M. Adinolfi
- Hossein Afsharnia
- Christine Angela Aidala
- Salvatore Aiola
- Ziad Ajaltouni
- S Akar
- Pietro Albicocco
- J. Albrecht
- Federico Alessio
- M. Alexander
- A. Alfonso Albero
- Georgy Alkhazov
- P. Alvarez Cartelle
- Antonio Augusto Alves Jr
- Sandra Amato
- Yasmine Amhis
- L. An
- Lucio Anderlini
- G. Andreassi
- M. Andreotti
- F. Archilli
- Philippe d'Argent
- J. Arnau Romeu
- A Artamonov
- Marina Artuso
- Kenenbek Arzymatov
- E. Aslanides
- Michele Atzeni
- Benjamin Audurier
- Sebastian Bachmann
- J. J. Back
- S. Baker
- V Balagura
- Wander Baldini
- Alexander Baranov
- Rj Barlow
- Sergey Barsuk
- William Barter
- Matteo Bartolini
- Fedor Baryshnikov
- Giovanni Bassi
- V. Batozskaya
- Baasansuren Batsukh
- Alexander Battig
- Vincenzo Battista
- A. Bay
- Maik Becker
- F. Bedeschi
- Ignacio Bediaga
- Andrew Beiter
- Lennaert Bel
- Vladislav Belavin
- Samuel Belin
- N. Beliy
- V. Bellée
- Konstantin Belous
- I. Belyaev
- E. Ben-Haim
- G. Bencivenni
- Sean Benson
- S. Beranek
- A Berezhnoy
- Roland Bernet
- Daniel Berninghoff
- Emilie Bertholet
- A. Bertolin
- Christopher Betancourt
- F. Betti
- M.-O. Bettler
- M van Beuzekom
- Ia. Bezshyiko
- Srishti Bhasin
- Jihyun Bhom
- Martin Stefan Bieker
- Simone Bifani
- P. Billoir
- Alex Birnkraut
- A Bizzeti
- Mikkel Bjørn
- Michele Piero Blago
- Thomas Blake
- Frederic Blanc
- Steven Blusk
- Dana Bobulska
- Valerio Bocci
- O. Boente Garcia
- Thomas Boettcher
- Alexey Boldyrev
- A. Bondar
- N. Bondar
- Silvia Borghi
- Maxim Borisyak
- M. Borsato
- Jozef Tomasz Borsuk
- Meriem Boubdir
- T. J. V. Bowcock
- C Bozzi
- S. Braun
- A. Brea Rodríguez
- Michael Brodski
- Jolanta Brodzicka
- A. Brossa Gonzalo
- Davide Brundu
- Emma Buchanan
- Annarita Buonaura
- C. Burr
- A Bursche
- Jordy Sebastiaan Butter
- J. Buytaert
- Wiktor Byczynski
- S Cadeddu
- H. Cai
- R. Calabrese
- Stefano Cali
- Ryan Calladine
- Marta Calvi
- M. Calvo Gomez
- Alessandro Camboni
- P. Campana
- D. Campora Perez
- L. Capriotti
- A Carboné
- G. Carboni
- R. Cardinale
- A. Cardini
- Paolo Carniti
- K Carvalho Akiba
- A. Casais Vidal
- Gianluigi Casse
- Marco Cattaneo
- Giovanni Cavallero
- R. Cenci
- Jacopo Cerasoli
- Michael Chapman
- Mj Charles
- Ph. Charpentier
- Georgios Chatzikonstantinidis
- M. Chefdeville
- Viktoriia Chekalina
- Chao Chen
- Shenjian Chen
- Aleksei Chernov
- Stefan-Gabriel Chitic
- Veronika Chobanova
- M. Chrząszcz
- Alexsei Chubykin
- P. Ciambrone
- Maria Flavia Cicala
- X. Cid Vidal
- Gregory Ciezarek
- Federico Cindolo
- P. E. L. Clarke
- Marco Clemencic
- H. V. Cliff
- Joel Closier
- John Leslie Cobbledick
- Victor Coco
- J. A. B. Coelho
- Julien Cogan
- E. Cogneras
- Lucian Cojocariu
- Paula Collins
- Tommaso Colombo
- Albert Comerma Montells
- A. Contu
- Naomi Cooke
- George Coombs
- S. Coquereau
- Gloria Corti
- C. M. Costa Sobral
- Benjamin Couturier
- G.A. Cowan
- D. C. Craik
- Andrew Crocombe
- M. Cruz Torres
- Robert Currie
- Carmelo DAmbrosio
- C. L. da Silva
- Elena Dall'Occo
- Jeremy Dalseno
- Anna Danilina
- 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
- C. T. Dean
- William Dean
- D. DeCamp
- L Del Buono
- Blaise Delaney
- H P Dembinski
- Moritz Demmer
- Adam Dendek
- Vadym Denysenko
- Denis Derkach
- O. Deschamps
- Fabrice Desse
- Francesco Dettori
- B. Dey
- A. Di Canto
- P. Di Nezza
- Sergey Didenko
- H. Dijkstra
- F Dordei
- Marco Dorigo
- A Dosil Suárez
- Lauren Douglas
- Anatoliy Dovbnya
- Karlis Dreimanis
- Maciej Wojciech Dudek
- L. Dufour
- Giulio Dujany
- Paolo Durante
- John Matthew Durham
- Deepanwita Dutta
- Rustem Dzhelyadin
- Michal Dziewiecki
- Agnieszka Dziurda
- Alexey Dzyuba
- Sajan Easo
- Ulrik Egede
- Victor Egorychev
- S. Eidelman
- Stephan Eisenhardt
- Surapat Ek-In
- Robert Ekelhof
- Lars Eklund
- S. Ely
- Alexandru Ene
- Stephan Escher
- Sevda Esen
- T M Evans
- Antonio Falabella
- Jingzhou Fan
- Nathanael Farley
- Stephen Farry
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- P. Fernandez Declara
- A Fernández Prieto
- Frank Ferrari
- L. Ferreira Lopes
- F Ferreira Rodrigues
- S. Ferreres Sole
- Massimiliano Ferro-Luzzi
- Sergey Filippov
- Rosa Anna Fini
- M. Fiorini
- Miroslaw Firlej
- K.M. Fischer
- Conor Fitzpatrick
- Tomasz Fiutowski
- Frederic Fleuret
- M Fontana
- Flavio Fontanelli
- R. W. Forty
- V. Franco Lima
- M. Franco-Sevilla
- M. J. Frank
- Christoph Frei
- David Anthony Friday
- Jinlin Fu
- W. Funk
- Mauricio Féo
- Emmy Gabriel
- A. Gallas-Torreira
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- S. Gallorini
- S. Gambetta
- Yuyue Gan
- Miriam Gandelman
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- L. M. Garcia Martin
- B. Garcia Plana
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- Marco Gersabeck
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- X. L. Zhu
- V. Zhukov
- Jennifer Brigitta Zonneveld
- S. Zucchelli
The decay-time-dependent CP asymmetry in Bs0→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 ϕ(1020) resonance, the CP-violating phase ϕs is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the Bs0-B¯s0 system, Δ Γ s. The difference of the average Bs0 and B meson decay widths, Γ s- Γ d, is determined using in addition a sample of B→ J/ ψK+π- decays. The values obtained are ϕs=-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 Bs0→J/ψπ+π- decays obtained using the same dataset as this analysis, and with previous independent LHCb results.
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