Observation of the Mass Difference between Neutral Charm-Meson Eigenstates.

@article{Aaij2021ObservationOT,
  title={Observation of the Mass Difference between Neutral Charm-Meson Eigenstates.},
  author={LHCb collaboration R. Aaij and Carlos Abellan Beteta and Thomas Ackernley and Bernardo Adeva and Marco Adinolfi and Hossein Afsharnia and Christine A. Aidala and S. Aiola and Ziad Ajaltouni and Simon Akar and Johannes Albrecht and Federico Alessio and Michael Thomas Alexander and Alejandro Alfonso Albero and Zakariya Aliouche and Georgy Alkhazov and Paula Alvarez Cartelle and S. Amato and Y. Amhis and Liupan An and L. Anderlini and Aleksei Andreianov and Mirco Andreotti and Flavio Archilli and Alexander Artamonov and Marina Artuso and Kenenbek Arzymatov and Elie Aslanides and Michele Atzeni and Benjamin Audurier and Sebastian Bachmann and Marie Bachmayer and John Back and Pablo Baladron Rodriguez and Vladislav Balagura and Wander Baldini and Juan Baptista Leite and R. J. Barlow and Sergey Barsuk and William Barter and Matteo Bartolini and Fedor Baryshnikov and J. M. Basels and G. Bassi and Baasansuren Batsukh and Alexander Battig and Aurelio Bay and Maik Becker and Franco Bedeschi and Ignacio Bediaga and Andrew Beiter and Vladislav Belavin and Samuel Belin and Violaine Bell{\'e}e and Konstantin Belous and I. N. Belov and I. M. Belyaev and Giovanni Bencivenni and E. Ben-Haim and Alexander V. Berezhnoy and Roland Bernet and Daniel Berninghoff and Harris Conan Bernstein and C. Bertella and Alessandro Bertolin and Christopher Betancourt and Federico Betti and Ia. Bezshyiko and Srishti Bhasin and Jihyun Bhom and Lingzhu Bian and Martin Stefan Bieker and Simone Bifani and P. Billoir and Matthew Birch and F.C.R. Bishop and A. Bitadze and Andrea Bizzeti and Mikkel Bj{\o}rn and Michele Piero Blago and Thomas Blake and Fr{\'e}d{\'e}ric Blanc and Steven R. Blusk and Dana Seman Bobulska and Julian Alexander Boelhauve and Oscar Boente Garc{\'i}a and Thomas Julian Boettcher and A. S. Boldyrev and Alexander E. Bondar and Nikolay Bondar and Silvia Borghi and Maxim Borisyak and M Borsato and Jozef Tomasz Borsuk and Sonia Amina Bouchiba and T. J. v. Bowcock and A. Boyer and C. Bozzi and Matthew John Bradley and Svende Annelies Braun and A. Brea Rodriguez and Michael Brodski and Jolanta Brodzicka and Arnau Brossa Gonzalo and Davide Brundu and Annarita Buonaura and Christopher Burr and Albert Bursche and Anatoly Butkevich and J. Butter and Jan A. N. Buytaert and Wiktor Byczynski and Sandro Cadeddu and H. Cai and Roberto Calabrese and Lukas Calefice and Liliet Calero Diaz and Stefano Cal{\'i} and Ryan Calladine and Marta Calvi and M. Calvo Gomez and Patricia Camargo Magalh{\~a}es and Pierluigi Campana and Angel Fernando Campoverde Quezada and Simone Capelli and Lorenzo Capriotti and A. Carbone and Graciela Carboni and Roberta Cardinale and Alessandro Cardini and I. Carli and P. Carniti and Leon David Carus and Kazuyoshi Carvalho Akiba and Adriana C. Vidal and Gianluigi Casse and Marco Cattaneo and G Cavallero and Sara Celani and Jacopo Cerasoli and Abbie Jane Chadwick and Matthew George Chapman and Matthew John Charles and Ph. Charpentier and Georgios Chatzikonstantinidis and Carlos Alberto Chavez Barajas and M. Chefdeville and C. Chen and S. Chen and Aleksei Chernov and Veronika Georgieva Chobanova and Serhii Cholak and M. Chrzaszcz and Alexsei Chubykin and Vladimir Chulikov and Paolo Ciambrone and Maria Flavia Cicala and Xabier Cid Vidal and Gregory Max Ciezarek and P. E. L. Clarke and Marco Clemencic and Harry Victor Cliff and Joel Closier and John Leslie Cobbledick and Victor Coco and Jo{\~a}o A. B. Coelho and Julien Cogan and Eric Cogneras and Lucian Nicolae Cojocariu and P. Collins and Tommaso Colombo and Liliana Congedo and Andrea Contu and Naomi Cooke and George Coombs and Gloria Corti and Cayo Mar Costa Sobral and Benjamin Couturier and Daniel C. Craik and J. Crkovsk'a and Melissa Maria Cruz Torres and Robert Currie and C. L. Da Silva and Shakhboz Tolibjonovich Dadabaev and Elena Dall’Occo and Jeremy Peter Dalseno and Carmelo D’Ambrosio and Anna Danilina and Philippe d'Argent and Adam C. S. Davis and Oscar De Aguiar Francisco and Kristof De Bruyn and Stefano de Capua and Michel De Cian and Jussara M. de Miranda and Leandro de Paula and Marilisa De Serio and Dario De Simone and Patrizia de Simone and J. A. de Vries and Cameron Thomas Dean and Daniel Decamp and Luigi Del Buono and Blaise Delaney and Hans Peter Dembinski and Adam Mateusz Dendek and Vadym Denysenko and Denis Derkach and Olivier Deschamps and Fabrice Desse and Francesco Dettori and Biplab Dey and Angelo Di Canto and Alessandro Di Cicco and Pasquale Di Nezza and S. I. Didenko and Lorena Dieste Maronas and H. B. Dijkstra and Vasyl Dobishuk and Amanda May Donohoe and Francesca Dordei and A. C. dos Reis and Lauren Douglas and Anatoliy Dovbnya and Anthony Gavin Downes and Karlis Dreimanis and Maciej Wojciech Dudek and Laurent Dufour and Viacheslav Duk and Paolo Durante and J. Matthew Durham and Deepanwita Dutta and Agnieszka Dziurda and Alexey Dzyuba and Sajan Easo and Ulrik Egede and Victor Egorychev and Semen Eidelman and Stephan Eisenhardt and Surapat Ek-In and Lars Eklund and Scott Ely and Alexandru Catalin Ene and Eliane Epple and Stephan Escher and Jonas Eschle and Sevda Esen and Timothy Evans and Antonio Falabella and J. Z. Fan and Y. Fan and Bo Fang and Stephen Farry and Davide Fazzini and M. F'eo and Antonio Fern{\'a}ndez Prieto and Jose Maria Fernandez-tenllado Arribas and A. D. Fernez and Frank Ferrari and Lino Ferreira Lopes and Fernando Luiz Ferreira Rodrigues and Silvia Ferreres Sole and Martina Ferrillo and Massimiliano Ferro-Luzzi and Sergey Filippov and Rosa Anna Fini and Massimiliano Fiorini and Miroslaw Firlej and K. M. Fischer and D. S. 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Műller and Colm Harold Murphy and D{\'o}nal Murray and Piera Muzzetto and P. Naik and T. Nakada and Rajalakshmi Nandakumar and Tara Nanut and Irina Nasteva and M. D. Needham and Ilaria Neri and N. Neri and Sebastian Neubert and Niko Neufeld and Ryan Newcombe and T. D. Nguyen and Chung Nguyen-Mau and Elisabeth Maria Niel and Simon Nieswand and Nikolay Nikitin and Niklas Stefan Nolte and C. Normand and Cynthia Nunez and Agnieszka Oblakowska-Mucha and Vladimir A. Obraztsov and Daniel O'Hanlon and R. G. C. Oldeman and Mario Edgardo Olivares and C. J. Gerco Onderwater and Robert O'neil and Anna Ossowska and Juan Otalora Goicochea and Tatiana Ovsiannikova and P. H. Owen and Arantza Oyanguren and Bhagyashree Pagare and Preema Rennee Pais and Tommaso Pajero and A. Palano and Matteo Palutan and Y. X. Pan and Gennady Panshin and Antonios Papanestis and Marco Pappagallo and Luciano Libero Pappalardo and Cheryl Pappenheimer and William Parker and Chris Parkes and Christopher J. 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Solovyev and Felipe Luan Souza De Almeida and Bruno Souza De Paula and Bernhard Spaan and Elisabetta Spadaro Norella and P. Spradlin and Federico Stagni and Marian Stahl and S. Stahl and Pavol Stefko and Olaf Steinkamp and O. V. Stenyakin and Holger Stevens and Sheldon Stone and Maria Elena Stramaglia and Mihai Straticiuc and Daria Strekalina and Fidan Suljik and J Sun and L. Sun and Y. Sun and Peter Svihra and Paul Nathaniel Swallow and Krzysztof Swientek and Adam Szabelski and Tomasz Szumlak and Maciej Pawel Szymanski and Shantam Taneja and A. R. Tanner and A. Terentev and Frederic Teubert and Eric Thomas and Kayleigh Anne Thomson and Vincent Tisserand and S T'jampens and Mark Tobin and Luca Tomassetti and Diego Torres Machado and Da Yu Tou and Minh T{\^a}m Tran and Ekaterina Trifonova and Carina Trippl and Giulia Tuci and Alison Maria Tully and Niels Tuning and Artur Ukleja and Daniel Joachim Unverzagt and Eduard Ursov and Andrii Usachov and Andrey Ustyuzhanin and Ulrich Uwer and Alexander Vagner and Vincenzo Vagnoni and Andrea Valassi and Giovanni Valenti and N{\'u}ria Valls Canudas and Martinus van Beuzekom and Maarten van Dijk and Eric van Herwijnen and Charlotte Barbara Van Hulse and Maarten van Veghel and Ricardo Vazquez Gomez and P. Vazquez Regueiro and Carlos V'azquez Sierra and Stefania Vecchi and J. J. Velthuis and Michele Veltri and Aravindhan Venkateswaran and Michele Veronesi and M. Vesterinen and Daniel Evangelho Vieira and Maria Vieites Diaz and Harald Viemann and Xavier Vilas{\'i}s-Cardona and Eva Figueras and A. Villa and Pascal Vincent and Dorothea vom Bruch and An. Vorobyev and Vitaly Vorobyev and Nikolai Voropaev and Kimberley Keri Vos and Roland Waldi and J. J. Walsh and C. Wang and J. Wang and M. G. Wang and R. M. Wang and Y. Wang and Z. Wang and Heather Mckenzie Wark and Nigel Keith Watson and Steffen Georg Weber and David Websdale and Constantin Weisser and Benedict Donald C Westhenry and Dylan James White and Mark Whitehead and Dirk Wiedner and G. R. Wilkinson and Mark C. Wilkinson and Ifan Williams and M. R. J. Williams and M.R.J. Williams and Fergus Wilson and Wojciech Wiślicki and Mariusz Witek and Lukas Witola and G. Wormser and Stephen Wotton and H Y Wu and Kenneth Wyllie and Zhiyu Xiang and Dong Xiao and Y. Y. Xie and Ao Xu and J. J. Xu and L. Xu and M. Xu and Q. N. Xu and Z. Z. Xu and D. Yang and S. M. Yang and Y. Yang and Z. W. Yang and Y. Yao and Lauren Emma Yeomans and Hang Yin and J. Yu and X. Q. Yuan and O. P. Yushchenko and E. Zaffaroni and Mikhail Zavertyaev and Milosz Zdybal and O. Zenaiev and Ming Zeng and D. F. Zhang and L. Zhang and S. N. Zhang and Y. Zhang and A. V. Zharkova and Alexey Zhelezov and Y. H. Zheng and X. K. Zhou and Y. X. Zhou and X. L. Zhu and Z. Zhu and Valery Zhukov and Jennifer Brigitta Zonneveld and Q. Zou and S. Zhou J. Zucchelli and Davide Zuliani and Gianluca Zunica},
  journal={Physical review letters},
  year={2021},
  volume={127 11},
  pages={
          111801
        }
}
A measurement of mixing and CP violation in neutral charm mesons is performed using data reconstructed in proton-proton collisions collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4  fb^{-1}. A total of 30.6 million D^{0}→K_{S}^{0}π^{+}π^{-} decays are analyzed using a method optimized for the measurement of the mass difference between neutral charm-meson eigenstates. Allowing for CP violation in mixing and in the interference between mixing and… Expand
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