On the universality (or not) of beautiful penguins

Yasmine Amhis

doi:10.1016/j.crhy.2017.09.010

Prix Jacques-Herbrand 2016 de l'Académie des sciences

On the universality (or not) of beautiful penguins
[Sur l'universalité (ou non) des beaux pingouins]

Yasmine Amhis ¹

¹ Laboratoire de l'accélérateur linéaire, Campus scientifique d'Orsay, 91898 Orsay cedex, France

Comptes Rendus. Physique, Volume 18 (2017) no. 5-6, pp. 358-364.

Résumé
Abstract

Malgré la solidité du modèle standard de la physique des particules, il a y de bonnes raisons de penser que ce n'est pas la théorie « ultime ». En particulier, le modèle standard ne peut expliquer, ni la matière noire, ni l'asymétrie matière–antimatière dans l'Univers. LHCb est un spectromètre du LHC (Large Hadron Collider) consacré à des mesures de précision des particules de saveurs lourdes. Comme des particules de nouvelle physique peuvent contribuer de manière virtuelle aux désintégrations de particules de saveurs lourdes et ainsi modifier leurs propriétés, de telles mesures sont sensibles à des masses bien plus élevées que celles accessibles grâce aux mesures directes. Dans le présent article, nous expliquons comment la présence de particules nouvelles peut être détectée en testant l'universalité du couplage aux leptons dans les désintégrations de hadrons contenant un quark b.

Despite the enduring resilience of the Standard Model of particle physics, there remain reasons to expect that it is not a “final” theory. In particular, the Standard Model can not explain either dark matter or the observed matter–antimatter asymmetry of the universe. LHCb is a forward acceptance spectrometer at the Large Hadron Collider, dedicated to precision measurements of heavy flavour particles. Because new particles can appear virtually in the decays of heavy flavour particles, and thus alter their properties, such measurements are inherently sensitive to much higher mass scales that direct searches. We present in this article how the presence of new particles can be probed by testing Lepton Universality in the decay of hadrons containing a b-quark.

Publié le : 2017-05-01

DOI : 10.1016/j.crhy.2017.09.010

Keywords: LHCb, Standard Model, Indirect search
Mot clés : LHCb, Modèle standard, Recherche indirecte

Affiliations des auteurs :

Yasmine Amhis ¹

¹ Laboratoire de l'accélérateur linéaire, Campus scientifique d'Orsay, 91898 Orsay cedex, France

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Yasmine Amhis. On the universality (or not) of beautiful penguins. Comptes Rendus. Physique, Volume 18 (2017) no. 5-6, pp. 358-364. doi : 10.1016/j.crhy.2017.09.010. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2017.09.010/

Bibliographie
Cité par

[1] Particle Data Group; C. Patrignani et al. Review of particle physics, Chin. Phys. C, Volume 40 (2016) no. 10

[2] Planck; P.A.R. Ade et al. Planck 2015 results. XIII. Cosmological parameters, Astron. Astrophys., Volume 594 (2016), p. A13 | arXiv

[3] CMS ATLAS; G. Aad et al. Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at $\sqrt{s} = 7$ and 8 TeV, J. High Energy Phys., Volume 08 (2016) | arXiv

[4] LHCb; R. Aaij et al. LHCb detector performance, Int. J. Mod. Phys. A, Volume 30 (2015) no. 07 | arXiv

[5] G. Buchalla; A.J. Buras; M.E. Lautenbacher Weak decays beyond leading logarithms, Rev. Mod. Phys., Volume 68 (1996), p. 1125 (For example) | arXiv

[6] MILC Collaboration Fermilab Lattice Collaboration; C. Aubin et al. Semileptonic decays of d mesons in three-flavor lattice QCD, Phys. Rev. Lett., Volume 94 (2005) (See for example)

[7] C. Bobeth; M. Misiak; J. Urban Photonic penguins at two loops and $m_{t}$ dependence of $B R [B \to X_{s} l^{+} l^{-}]$ , Nucl. Phys. B, Volume 574 (2000), p. 291 | arXiv

[8] LHCb; R. Aaij et al. Measurement of the $B_{s}^{0} \to μ^{+} μ^{-}$ branching fraction and effective lifetime and search for $B^{0} \to μ^{+} μ^{-}$ decays, Phys. Rev. Lett., Volume 118 (2017) no. 19 | arXiv

[9] LHCb; R. Aaij et al. Precision measurement of CP violation in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays, Phys. Rev. Lett., Volume 114 (2015) no. 4 | arXiv

[10] M. Bordone; G. Isidori; A. Pattori On the Standard Model predictions for $R_{K}$ and $R_{K^{⁎}}$ , Eur. Phys. J. C, Volume 76 (2016) no. 8, p. 440 | arXiv

[11] B. Capdevila; S. Descotes-Genon; L. Hofer; J. Matias Hadronic uncertainties in $B \to K^{⁎} μ^{+} μ^{-}$ : a state-of-the-art analysis, J. High Energy Phys., Volume 04 (2017) | arXiv

[12] N. Serra; R.S. Coutinho; D. van Dyk Measuring the breaking of lepton flavor universality in $B \to K^{⁎} ℓ^{+} ℓ^{-}$ , Phys. Rev. D, Volume 95 (2017) no. 3 | arXiv

[13] W. Altmannshofer; C. Niehoff; P. Stangl; D.M. Straub Status of the $B \to K^{⁎} μ^{+} μ^{-}$ anomaly after Moriond 2017, Eur. Phys. J. C, Volume 77 (2017) no. 6, p. 377 | arXiv

[14] S. Jäger; M.C. Jorge Reassessing the discovery potential of the $B \to K^{⁎} ℓ^{+} ℓ^{-}$ decays in the large-recoil region: SM challenges and BSM opportunities, Phys. Rev. D, Volume 93 (2016) no. 1 | arXiv

[15] LHCb; R. Aaij et al. Test of lepton universality using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ decays, Phys. Rev. Lett., Volume 113 (2014) | arXiv

[16] LHCb; R. Aaij et al. Test of lepton universality with $B^{0} \to K^{⁎ 0} ℓ^{+} ℓ^{-}$ decays | arXiv

[17] BaBar; J.P. Lees et al. Measurement of branching fractions and rate asymmetries in the rare decays $B \to K^{(⁎)} l^{+} l^{-}$ , Phys. Rev. D, Volume 86 (2012) | arXiv

[18] Belle; J.-T. Wei et al. Measurement of the differential branching fraction and forward–backword asymmetry for $B \to K^{(⁎)} ℓ^{+} ℓ^{-}$ , Phys. Rev. Lett., Volume 103 (2009) | arXiv

[19] D. Becireciv; O. Sumensari A leptoquark model to accommodate $R_{K}^{\exp} < R_{K}^{SM}$ and $R_{K^{⁎}}^{\exp} < R_{K^{⁎}}^{SM}$ | arXiv

[20] S. Fajfer; N. Kosnik Vector leptoquark resolution of $R_{K}$ and $R_{D^{(⁎)}}$ puzzles, Phys. Lett. B, Volume 755 (2016), p. 270 | arXiv

[21] G. Hiller; I. Nisandzic $R_{K}$ and $R_{K^{⁎}}$ beyond the Standard Model | arXiv

[22] G. D'Amico et al. Flavour anomalies after the $R_{K^{⁎}}$ measurement | arXiv

[23] J.F. Kamenik; Y. Soreq; J. Zupan Lepton flavor universality violation without new sources of quark flavor violation | arXiv

[24] W. Altmannshofer; P. Stangl; D.M. Straub Interpreting hints for lepton flavor universality violation | arXiv

[25] B. Capdevila et al. Patterns of New Physics in $b \to s ℓ^{+} ℓ^{-}$ transitions in the light of recent data | arXiv

[26] C. Autermann Experimental status of supersymmetry after the LHC Run-I, Prog. Part. Nucl. Phys., Volume 90 (2016), p. 125 | arXiv

[27] LHCb collaboration; R. Aaij et al. Framework TDR for the LHCb Upgrade: Technical Design Report, April 2012 (Tech. Rep. CERN-LHCC-2012-007, LHCb-TDR-12)

[28] LHCb Collaboration; R. Aaij et al. Expression of Interest for a Phase-II LHCb Upgrade: Opportunities in Flavour Physics, and Beyond, in the HL-LHC Era, CERN, Geneva, Switzerland, February 2017 (Tech. Rep. CERN-LHCC-2017-003)

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