$C{\hspace{-1.69998pt}}P$ violation in $B$ decays

Yosef Nir; Vincenzo Vagnoni

doi:10.5802/crphys.11

C P

violation in

B

decays
[Brisure de la symétrie CP dans les désintégrations de mésons beaux]

Yosef Nir ¹ ; Vincenzo Vagnoni ²

¹ Weizmann Institute, Department of Particle Physics and Astrophysics, Rehovot 7610001, Israel
² Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy

Comptes Rendus. Physique, A perspective of High Energy Physics from precision measurements, Volume 21 (2020) no. 1, pp. 61-74.

Résumé
Abstract

L’étude expérimentale de la brisure de la symétrie CP dans les désintégrations de mésons beaux ( $B$ ) a apporté des contributions majeures à notre compréhension de la nature : (i) Elle a établi que le mécanisme de Kobayashi-Maskawa est la source dominante de brisure de la symétrie CP dans les systèmes des mésons $K$ et $B$ . (ii) Elle a amélioré significativement la précision des paramètres qui décrivent la matrice de mélange des quarks Cabibbo–Kobayashi–Maskawa. (iii) Elle a prouvé que l’échelle d’énergie d’une nouvelle physique avec des couplages de changement de saveurs d’ordre unité, devait être supérieure à $𝒪 (10^{3} TeV)$ . Des progrès sont attendus, dans cette décennie et la suivante, des expériences du LHC et Belle II. L’état de l’art de cette Physique et les perspectives des expériences futures sont discutés dans cet article.

The experimental study of CP violation in $B$ decays has led to significant progress in our understanding of nature: (i) It demonstrated that the Kobayashi-Maskawa mechanism is the dominant source of CP violation in meson decays. (ii) It improved significantly the precision in the determination of the parameters of the Cabibbo–Kobayashi–Maskawa quark-mixing matrix. (iii) It proved that new physics that has order-one flavour-changing couplings to the $b$ quark should be characterised by a mass scale higher than $𝒪 (10^{3} TeV)$ . Further progress is expected from the Belle II and LHC experiments during the next decade and beyond. Present status and perspectives are here discussed.

Publié le : 2020-09-17

DOI : 10.5802/crphys.11

Keywords: Meson, Decay, LHC, Large Hadron Collider, CP symmetry violation
Mots-clés : Méson, Désintégration, LHC, Grand collisionneur de hadrons, Violation de symétrie CP

Affiliations des auteurs :

Yosef Nir ¹ ; Vincenzo Vagnoni ²

¹ Weizmann Institute, Department of Particle Physics and Astrophysics, Rehovot 7610001, Israel
² Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy

Licence :

CC-BY 4.0

Droits d'auteur : Les auteurs conservent leurs droits

@article{CRPHYS_2020__21_1_61_0,
     author = {Yosef Nir and Vincenzo Vagnoni},
     title = {$C{\hspace{-1.69998pt}}P$ violation in $B$ decays},
     journal = {Comptes Rendus. Physique},
     pages = {61--74},
     publisher = {Acad\'emie des sciences, Paris},
     volume = {21},
     number = {1},
     year = {2020},
     doi = {10.5802/crphys.11},
     language = {en},
}

TY  - JOUR
AU  - Yosef Nir
AU  - Vincenzo Vagnoni
TI  - $C{\hspace{-1.69998pt}}P$ violation in $B$ decays
JO  - Comptes Rendus. Physique
PY  - 2020
SP  - 61
EP  - 74
VL  - 21
IS  - 1
PB  - Académie des sciences, Paris
DO  - 10.5802/crphys.11
LA  - en
ID  - CRPHYS_2020__21_1_61_0
ER  -

%0 Journal Article
%A Yosef Nir
%A Vincenzo Vagnoni
%T $C{\hspace{-1.69998pt}}P$ violation in $B$ decays
%J Comptes Rendus. Physique
%D 2020
%P 61-74
%V 21
%N 1
%I Académie des sciences, Paris
%R 10.5802/crphys.11
%G en
%F CRPHYS_2020__21_1_61_0

Yosef Nir; Vincenzo Vagnoni. $C{\hspace{-1.69998pt}}P$ violation in $B$ decays. Comptes Rendus. Physique, A perspective of High Energy Physics from precision measurements, Volume 21 (2020) no. 1, pp. 61-74. doi : 10.5802/crphys.11. https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.11/

Bibliographie
Cité par

[1] A. D. Sakharov Violation of CP invariance, C asymmetry, and baryon asymmetry of the universe, Pisma Zh. Eksp. Teor. Fiz., Volume 5 (1967), pp. 32-35 | DOI

[2] N. Cabibbo Unitary symmetry and leptonic decays, Phys. Rev. Lett., Volume 10 (1963) no. 12, pp. 531-533 | DOI

[3] M. Kobayashi; T. Maskawa CP violation in the renormalizable theory of weak interaction, Prog. Theor. Phys., Volume 49 (1973), pp. 652-657 | DOI

[4] A. G. Cohen; D. B. Kaplan; A. E. Nelson Progress in electroweak baryogenesis, Ann. Rev. Nucl. Part. Sci., Volume 43 (1993), pp. 27-70 | DOI

[5] A. Riotto; M. Trodden Recent progress in baryogenesis, Ann. Rev. Nucl. Part. Sci., Volume 49 (1999), pp. 35-75 | DOI

[6] W.-S. Hou Source of CP violation for the baryon asymmetry of the universe, Chin. J. Phys., Volume 47 (2009), pp. 134-141

[7] S. L. Glashow; J. Iliopoulos; L. Maiani Weak interactions with lepton-hadron symmetry, Phys. Rev. D, Volume 2 (1970) no. 7, pp. 1285-1292 | DOI

[8] J. H. Christenson; J. W. Cronin; V. L. Fitch; R. Turlay Evidence for the 2 $π$ decay of the $K_{2}^{0}$ meson, Phys. Rev. Lett., Volume 13 (1964) no. 4, pp. 138-140 | DOI

[9] J. J. Aubert Experimental observation of a heavy particle J, Phys. Rev. Lett., Volume 33 (1974) no. 23, pp. 1404-1406 | DOI

[10] J. E. Augustin Discovery of a narrow resonance in e $^{+}$ e $^{-}$ annihilation, Phys. Rev. Lett., Volume 33 (1974) no. 23, pp. 1406-1408 | DOI

[11] S. W. Herb Observation of a dimuon resonance at 9.5-GeV in 400-GeV proton–nucleus collisions, Phys. Rev. Lett., Volume 39 (1977) no. 5, pp. 252-255 | DOI

[12] CDF collaboration; F. Abe Observation of top quark production in $\bar{p} p$ collisions, Phys. Rev. Lett., Volume 74 (1995) no. 14, pp. 2626-2631 | DOI

[13] CLEO collaboration; D. Andrews The CLEO detector, Nucl. Instrum. Meth., Volume 211 (1983) no. 1, pp. 47-71 | DOI

[14] A. B. Carter; A. I. Sanda CP violation in B meson decays, Phys. Rev. D, Volume 23 (1981) no. 7, pp. 1567-1579 | DOI

[15] I. I. Y. Bigi; A. I. Sanda On B $^{0}$ – ${\bar{B}}^{0}$ mixing and violations of CP symmetry, Phys. Rev. D, Volume 29 (1984) no. 7, pp. 1393-1398 | DOI

[16] ARGUS collaboration; H. Albrecht ARGUS: A universal detector at DORIS-II, Nucl. Instrum. Meth. A, Volume 275 (1989) no. 1, pp. 1-48 | DOI

[17] P. Oddone Detector considerations, eConf, Volume C870126 (1987), pp. 423-446

[18] BaBar collaboration; B. Aubert The BaBar detector, Nucl. Instrum. Meth. A, Volume 479 (2002) no. 1, pp. 1-116 | DOI

[19] A. Abashian The Belle detector, Nucl. Instrum. Meth. A, Volume 479 (2002) no. 1, pp. 117-232 | DOI

[20] BaBar collaboration; B. Aubert Measurement of time-dependent CP asymmetry in $B^{0} \to c \bar{c} K^{(*) 0}$ decays, Phys. Rev. D, Volume 79 (2009), 072009

[21] I. Adachi Precise measurement of the CP violation parameter $sin 2 φ_{1}$ in $B^{0} \to (c \bar{c}) K^{0}$ decays, Phys. Rev. Lett., Volume 108 (2012), 171802 | DOI

[22] BaBar and Belle Collaborations; A. J. Bevan The Physics of the B Factories, Eur. Phys. J. X, Volume 74 (2014), 3026

[23] CDF collaboration; A. Abulencia Observation of $B_{s}^{0}$ – ${\bar{B}}_{s}^{0}$ oscillations, Phys. Rev. Lett., Volume 97 (2006), 242003

[24] Gary John Barker b-physics at LEP (2010), pp. 1-21 | DOI

[25] P. C. Rowson; D. Su; S. Willocq Highlights of the SLD physics program at the SLAC linear collider, Ann. Rev. Nucl. Part. Sci., Volume 51 (2001), pp. 345-412 | DOI

[26] LHCb collaboration; A. A. Alves Jr. The LHCb detector at the LHC, JINST, Volume 3 (2008), S08005

[27] ATLAS collaboration; G. Aad The ATLAS experiment at the CERN Large Hadron Collider, JINST, Volume 3 (2008), S08003

[28] CMS collaboration; S. Chatrchyan The CMS experiment at the CERN LHC, JINST, Volume 3 (2008), S08004

[29] T. Abe (“Belle II Collaboration, Belle II Technical Design Report”, KEK Report 2010-1, 2010)

[30] Particle Data Group; M. Tanabashi Review of particle physics, Phys. Rev. D, Volume 98 (2018), 030001

[31] CKMfitter Group; J. Charles CP violation and the CKM matrix: Assessing the impact of the asymmetric B factories, Eur. Phys. J. C, Volume 41 (2005), pp. 1-131 (updated results and plots available at http://ckmfitter.in2p3.fr) | DOI

[32] UTfit Collaboration; M. Bona Model-independent constraints on $Δ F = 2$ operators and the scale of new physics, J. High Energy Phys., Volume 0803 (2008), 049 (updated results and plots available at http://www.utfit.org)

[33] M. Gronau; D. Wyler On determining a weak phase from CP asymmetries in charged B decays, Phys. Lett. B, Volume 265 (1991) no. 1, pp. 172-176 | DOI

[34] M. Gronau; D. London How to determine all the angles of the unitarity triangle from $B^{0} \to D K_{S}^{0}$ and $B_{s}^{0} \to D φ$ , Phys. Lett. B, Volume 253 (1991) no. 3-4, pp. 483-488 | DOI

[35] D. Atwood; I. Dunietz; A. Soni Enhanced CP violation with B $\to$ KD $^{0}$ ( ${\bar{D}}^{0}$ ) modes and extraction of the CKM angle $γ$ , Phys. Rev. Lett., Volume 78 (1997) no. 17, pp. 3257-3260 | DOI

[36] D. Atwood; I. Dunietz; A. Soni Improved methods for observing CP violation in B $^{\pm}$ $\to$ KD and measuring the CKM phase $γ$ , Phys. Rev. D, Volume 63 (2001), 036005

[37] A. Giri; Y. Grossman; A. Soffer; J. Zupan Determining $γ$ using B $^{\pm}$ $\to$ DK $^{\pm}$ with multibody D decays, Phys. Rev. D, Volume 68 (2003), 054018

[38] (ATLAS Collaboration, Measurement of the CP violation phase $φ_{s}$ in B $_{s}$ $\to$ $J / ψ φ$ decays in ATLAS at 13 TeV, ATLAS-CONF-2019-009)

[39] CMS Collaboration; V. Khachatryan Measurement of the CP-violating weak phase $φ_{s}$ and the decay width difference $Δ Γ_{s}$ using the $B_{s}^{0} \to J / ψ φ (1020)$ decay channel in pp collisions at $\sqrt{s} = 8 TeV$ , Phys. Lett. B, Volume 757 (2016), pp. 97-120

[40] LHCb Collaboration; R. Aaij Updated measurement of time-dependent CP-violating observables in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays, Eur. Phys. J. C, Volume 79 (2019), 706 | DOI

[41] LHCb Collaboration; R. Aaij Measurement of the CP-violating phase $φ_{s}$ from $B_{s}^{0} \to J / ψ π^{+} π^{-}$ decays in 13 TeV pp collisions, Phys. Lett. B, Volume 797 (2019), 134789

[42] HFLAV Collaboration; Y. S. Amhis Averages of b-hadron, c-hadron, and $τ$ -lepton properties as of 2018, 2019 (preprint, updated results and plots available at https://hflav.web.cern.ch) | arXiv

[43] (LHCb Collaboration, Update of the LHCb combination of the CKM angle $γ$ , LHCb-CONF-2018-002)

[44] LHCb Collaboration; R. Aaij First measurement of time-dependent CP violation in $B_{s}^{0} \to K^{+} K^{-}$ decays, J. High Energy Phys., Volume 2013 (2013), 183 | DOI

[45] LHCb Collaboration; R. Aaij Measurement of CP asymmetries in two-body $B_{(s)}^{0}$ -meson decays to charged pions and kaons, Phys. Rev. D, Volume 98 (2018), 032004

[46] R. Fleischer New strategies to extract $β$ and $γ$ from B $_{d}$ $\to$ $π$ $^{+}$ $π$ $^{-}$ and B $_{s}$ $\to$ K $^{+}$ K $^{-}$ , Phys. Lett. B, Volume 459 (1999), pp. 306-320

[47] R. Fleischer $B_{s, d}^{0} \to π π, π K, K K$ : Status and Prospects, Eur. Phys. J. C, Volume 52 (2007), pp. 267-281 | DOI

[48] M. Ciuchini; E. Franco; S. Mishima; L. Silvestrini Testing the Standard Model and Searching for New Physics with B $_{d}$ $\to$ $π$ $π$ and B $_{s}$ $\to$ KK Decays, J. High Energy Phys., Volume 1210 (2012), 29

[49] LHCb Collaboration; R. Aaij Determination of $γ$ and $- 2 β_{s}$ from charmless two-body decays of beauty mesons, Phys. Lett. B, Volume 741 (2015), pp. 1-11 | DOI

[50] LHCb Collaboration; R. Aaij Measurements of CP violation in the three-body phase space of charmless B $^{\pm}$ decays, Phys. Rev. D, Volume 90 (2014), 112004

[51] LHCb Collaboration; R. Aaij Amplitude analysis of B $^{\pm}$ $\to$ $π$ $^{\pm}$ K $^{+}$ K $^{-}$ decays, Phys. Rev. Lett., Volume 123 (2019), 231802

[52] LHCb Collaboration; R. Aaij Observation of several sources of CP violation in B $^{+}$ $\to$ $π$ $^{+}$ $π$ $^{+}$ $π$ $^{-}$ decays, Phys. Rev. Lett., Volume 124 (2020), 031801

[53] LHCb Collaboration; R. Aaij Amplitude analysis of the B $^{+}$ $\to$ $π$ $^{+}$ $π$ $^{+}$ $π$ $^{-}$ decay, Phys. Rev. D, Volume 101 (2020), 012006

[54] LHCb Collaboration; R. Aaij Amplitude analysis of $B_{s}^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays, J. High Energy Phys., Volume 2019 (2019), 114 | DOI

[55] D0 Collaboration; V. M. Abazov Study of CP-violating charge asymmetries of single muons and like-sign dimuons in pp collisions, Phys. Rev. D, Volume 89 (2014), 012002

[56] LHCb Collaboration; R. Aaij Measurement of the semileptonic CP asymmetry in $B^{0} - {\bar{B}}^{0}$ mixing, Phys. Rev. Lett., Volume 114 (2015), 041601

[57] LHCb Collaboration; R. Aaij Measurement of the CP asymmetry in $B_{s}^{0} - \bar{B}_{s}^{0}$ mixing, Phys. Rev. Lett., Volume 117 (2016), 061803

[58] (LHCb Collaboration, Expression of Interest for a Phase-II LHCb Upgrade: Opportunities in flavour physics, and beyond, in the HL-LHC era, CERN-LHCC-2017-003)

[59] LHCb Collaboration; R. Aaij (“Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era”, CERN-LHCC-2018-027, 2018)

[60] A. Cerri Opportunities in Flavour Physics at the HL-LHC and HE-LHC, CERN Yellow Rep. Monogr., Volume 7 (2019), pp. 867-1158 | DOI

Cité par Sources :

Commentaires - Politique