Observation of CP violation in two-body $$ {B}_{(s)}^0 $$-meson decays to charged pions and kaons-Reference-Cited by-同舟云学术

Observation of CP violation in two-body $$ {B}_{(s)}^0 $$-meson decays to charged pions and kaons

Published:2021-03 Issue:3 Volume:2021 Page:
ISSN:1029-8479
Container-title:Journal of High Energy Physics
language:en
Short-container-title:J. High Energ. Phys.

Author:

Aaij R., ,Abellán Beteta C.,Ackernley T.,Adeva B.,Adinolfi M.,Afsharnia H.,Aidala C. A.,Aiola S.,Ajaltouni Z.,Akar S.,Albrecht J.,Alessio F.,Alexander M.,Alfonso Albero A.,Aliouche Z.,Alkhazov G.,Alvarez Cartelle P.,Amato S.,Amhis Y.,An L.,Anderlini L.,Andreianov A.,Andreotti M.,Archilli F.,Artamonov A.,Artuso M.,Arzymatov K.,Aslanides E.,Atzeni M.,Audurier B.,Bachmann S.,Bachmayer M.,Back J. J.,Baker S.,Baladron Rodriguez P.,Balagura V.,Baldini W.,Baptista Leite J.,Barlow R. J.,Barsuk S.,Barter W.,Bartolini M.,Baryshnikov F.,Basels J. M.,Bassi G.,Batsukh B.,Battig A.,Bay A.,Becker M.,Bedeschi F.,Bediaga I.,Beiter A.,Belavin V.,Belin S.,Bellee V.,Belous K.,Belov I.,Belyaev I.,Bencivenni G.,Ben-Haim E.,Berezhnoy A.,Bernet R.,Berninghoff D.,Bernstein H. C.,Bertella C.,Bertholet E.,Bertolin A.,Betancourt C.,Betti F.,Bettler M. O.,Bezshyiko Ia.,Bhasin S.,Bhom J.,Bian L.,Bieker M. S.,Bifani S.,Billoir P.,Birch M.,Bishop F. C. R.,Bizzeti A.,Bjørn M.,Blago M. P.,Blake T.,Blanc F.,Blusk S.,Bobulska D.,Boelhauve J. A.,Boente Garcia O.,Boettcher T.,Boldyrev A.,Bondar A.,Bondar N.,Borghi S.,Borisyak M.,Borsato M.,Borsuk J. T.,Bouchiba S. A.,Bowcock T. J. V.,Boyer A.,Bozzi C.,Bradley M. J.,Braun S.,Brea Rodriguez A.,Brodski M.,Brodzicka J.,Brossa Gonzalo A.,Brundu D.,Buonaura A.,Burr C.,Bursche A.,Butkevich A.,Butter J. S.,Buytaert J.,Byczynski W.,Cadeddu S.,Cai H.,Calabrese R.,Calefice L.,Calero Diaz L.,Cali S.,Calladine R.,Calvi M.,Calvo Gomez M.,Camargo Magalhaes P.,Camboni A.,Campana P.,Campora Perez D. H.,Campoverde Quezada A. F.,Capelli S.,Capriotti L.,Carbone A.,Carboni G.,Cardinale R.,Cardini A.,Carli I.,Carniti P.,Carus L.,Carvalho Akiba K.,Casais Vidal A.,Casse G.,Cattaneo M.,Cavallero G.,Celani S.,Cerasoli J.,Chadwick A. J.,Chapman M. G.,Charles M.,Charpentier Ph.,Chatzikonstantinidis G.,Chavez Barajas C. A.,Chefdeville M.,Chen C.,Chen S.,Chernov A.,Chitic S.-G.,Chobanova V.,Cholak S.,Chrzaszcz M.,Chubykin A.,Chulikov V.,Ciambrone P.,Cicala M. F.,Cid Vidal X.,Ciezarek G.,Clarke P. E. L.,Clemencic M.,Cliff H. V.,Closier J.,Cobbledick J. L.,Coco V.,Coelho J. A. B.,Cogan J.,Cogneras E.,Cojocariu L.,Collins P.,Colombo T.,Congedo L.,Contu A.,Cooke N.,Coombs G.,Corti G.,Costa Sobral C. M.,Couturier B.,Craik D. C.,Crkovská J.,Cruz Torres M.,Currie R.,Da Silva C. L.,Dall’Occo E.,Dalseno J.,D’Ambrosio C.,Danilina A.,d’Argent P.,Davis A.,De Aguiar Francisco O.,De Bruyn K.,De Capua S.,De Cian M.,De Miranda J. M.,De Paula L.,De Serio M.,De Simone D.,De Simone P.,de Vries J. A.,Dean C. T.,Dean W.,Decamp D.,Del Buono L.,Delaney B.,Dembinski H.-P.,Dendek A.,Denysenko V.,Derkach D.,Deschamps O.,Desse F.,Dettori F.,Dey B.,Di Nezza P.,Didenko S.,Dieste Maronas L.,Dijkstra H.,Dobishuk V.,Donohoe A. M.,Dordei F.,dos Reis A. C.,Douglas L.,Dovbnya A.,Downes A. G.,Dreimanis K.,Dudek M. 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Abstract

Abstract The time-dependent CP asymmetries of B0→ π+π− and

$$ {B}_s^0 $$

B s 0 → K+K− decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are

$$ {\displaystyle \begin{array}{c}{C}_{\pi \pi}=-0.311\pm 0.045\pm 0.015,\\ {}{S}_{\pi \pi}=-0.706\pm 0.042\pm 0.013,\\ {}{C}_{KK}=0.123\pm 0.034\pm 0.015,\\ {}{S}_{KK}=0.164\pm 0.034\pm 0.014,\\ {}{\mathcal{A}}_{KK}^{\Delta \varGamma }=-0.83\pm 0.05\pm 0.09,\end{array}} $$

C ππ = − 0.311 ± 0.045 ± 0.015 , S ππ = − 0.706 ± 0.042 ± 0.013 , C KK = 0.123 ± 0.034 ± 0.015 , S KK = 0.164 ± 0.034 ± 0.014 , A KK Δ Γ = − 0.83 ± 0.05 ± 0.09 ,

where the first uncertainties are statistical and the second systematic. The same data sample is used to measure the time-integrated CP asymmetries of B0→ K + π− and

$$ {B}_s^0 $$

B s 0 →K−π+ decays and the results are

$$ {\displaystyle \begin{array}{c}{A}_{CP}^{B^0}=-0.0824\pm 0.0033\pm 0.0033,\\ {}{A}_{CP}^{B_s^0}=0.236\pm 0.013\pm 0.011.\end{array}} $$

A CP B 0 = − 0.0824 ± 0.0033 ± 0.0033 , A CP B s 0 = 0.236 ± 0.013 ± 0.011 . All results are consistent with earlier measurements. A combination of LHCb measurements provides the first observation of time-dependent CP violation in

$$ {B}_s^0 $$

B s 0 decays.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Link

http://link.springer.com/content/pdf/10.1007/JHEP03(2021)075.pdf

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