Charmless b-hadron decays at LHCb

Authors

  • Irina Nasteva Universidade Federal do Rio de Janeiro

DOI:

https://doi.org/10.31349/SuplRevMexFis.3.0308062

Keywords:

LHCb, charmless B meson decays, hadronic B decays, multibody B decays, CP violation

Abstract

Measurements of CP asymmetries in charmless two-body B-meson decays can provide stringent tests of the Standard Model. In multibody decays, short and long-distance dynamics along with a sizeable effective weak phase in the interference between tree and penguin amplitudes can lead to a rich structure of CP violation as a function of the phase space. We present here the latest studies of CP violation in charmless b-hadron decays, in particular those with baryons in the initial and final states.

References

I. Bediaga and C. Gobel, “Direct CP violation in beauty and charm hadron decays,” Prog. Part. Nucl. Phys. 114 (2020), 103808 doi:10.1016/j.ppnp.2020.103808 [arXiv:2009.07037 [hep-ex]].

A. A. Alves, Jr. et al. [LHCb], “The LHCb Detector at the LHC,” JINST 3 (2008), S08005 doi:10.1088/1748- 0221/3/08/S08005

R. Aaij et al. [LHCb], “LHCb Detector Performance,” Int. J. Mod. Phys. A 30 (2015) no.07, 1530022 doi:10.1142/S0217751X15300227 [arXiv:1412.6352 [hep- ex]].

R. Aaij et al. [LHCb], “Observation of CP violation in two-body B0-meson decays to charged pions and kaons,” JHEP 03 (2021), 075 doi:10.1007/JHEP03(2021)075 [arXiv:2012.05319 [hep-ex]].

R. Aaij et al. [LHCb], “Measurement of CP violation in the decay B+ → K+π0,” Phys. Rev. Lett. 126 (2021) no.9, 091802 doi:10.1103/PhysRevLett.126.091802 [arXiv:2012.12789 [hep-ex]].

A. J. Buras, R. Fleischer, S. Recksiegel and F. Schwab, “The B → πK puzzle and its relation to rare B and K decays,” Eur. Phys. J. C 32 (2003), 45-54 doi:10.1140/epjc/s2003-01379-9 [arXiv:hep-ph/0309012 [hep-ph]].

R. Aaij et al. [LHCb], “Measurements of CP violation in the three-body phase space of charmless B± decays,” Phys. Rev. D 90 (2014) no.11, 112004 doi:10.1103/PhysRevD.90.112004 [arXiv:1408.5373 [hep-ex]].

R. Aaij et al. [LHCb], “Amplitude analysis of B± → π±K+K− decays,” Phys. Rev. Lett. 123 (2019) no.23, 231802 doi:10.1103/PhysRevLett.123.231802 [arXiv:1905.09244 [hep-ex]].

J. H. Alvarenga Nogueira, I. Bediaga, A. B. R. Cavalcante, T. Frederico and O. Lourenço, “CP violation: Dalitz interference, CPT, and final state interactions,” Phys. Rev. D 92 (2015) no.5, 054010 doi:10.1103/PhysRevD.92.054010 [arXiv:1506.08332 [hep-ph]].

J. R. Pelaez and F. J. Yndurain, “The Pion-pion scattering amplitude,” Phys. Rev. D 71 (2005), 074016 doi:10.1103/PhysRevD.71.074016 [arXiv:hep-ph/0411334 [hep-ph]].

R. Aaij et al. [LHCb], “Observation of several sources of CP violation in B+ → π+π+π− decays,” Phys. Rev. Lett. 124 (2020) no.3, 031801 doi:10.1103/PhysRevLett.124.031801 [arXiv:1909.05211 [hep-ex]].

R. Aaij et al. [LHCb], “Amplitude analysis of the B+ → π+π+π− decay,” Phys. Rev. D 101 (2020) no.1, 012006 doi:10.1103/PhysRevD.101.012006 [arXiv:1909.05212 [hep- ex]].

J. A. Oller, “Final state interactions in hadronic D decays,” Phys. Rev. D 71 (2005), 054030 doi:10.1103/PhysRevD.71.054030 [arXiv:hep-ph/0411105 [hep-ph]].

I. Bediaga, T. Frederico and O. Lourenc ̧ o, “CP violation and CPT invariance in B± decays with final state interactions,” Phys. Rev. D 89 (2014) no.9, 094013 doi:10.1103/PhysRevD.89.094013 [arXiv:1307.8164 [hep-ph]].

R.H. Dalitz and S.F. Tuan,“The phenomenological representation of K-nucleon scattering and reaction amplitudes”, Annals Phys. 10 (1960) 307. doi:10.1016/0003-4916(60)90001-4

E.M. Aitala et al. [E791],“Model independent measurement of S-wave K−π+ systems using D+ → Kππ decays from Fermilab E791,” Phys. Rev. D 73 (2006), 032004 [erratum: Phys. Rev. D 74 (2006), 059901] doi:10.1103/PhysRevD.73.032004 [arXiv:hep-ex/0507099 [hep-ex]].

R. Aaij et al. [LHCb], “Measurement of the relative branching fractions of B+ → h+h′+h′− decays,” Phys. Rev. D 102 (2020), 112010 doi:10.1103/PhysRevD.102.112010 [arXiv:2010.11802 [hep-ex]].

R. Aaij et al. [LHCb], “Search for CP violation in Ξ−b → pK − K − decays,” Phys. Rev. D 104 (2021) no.5, 052010 doi:10.1103/PhysRevD.104.052010 [arXiv:2104.15074 [hep- ex]].

R. Aaij et al. [LHCb], “Measurement of matter-antimatter differences in beauty baryon decays,” Nature Phys. 13 (2017), 391-396 doi:10.1038/nphys4021 [arXiv:1609.05216 [hep-ex]].

M. Williams, “Observing CP violation in many-body decays,” Phys. Rev. D 84 (2011), 054015 doi:10.1103/PhysRevD.84.054015 [arXiv:1105.5338 [hep- ex]].

R. Aaij et al. [LHCb], “Search for CP violation and observation of P violation in Λ0b → pπ−π+π− decays,” Phys. Rev. D 102 (2020) no.5, 051101 doi:10.1103/PhysRevD.102.051101 [arXiv:1912.10741 [hep-ex]].

Downloads

Published

2022-06-08

How to Cite

1.
Nasteva I. Charmless b-hadron decays at LHCb. Supl. Rev. Mex. Fis. [Internet]. 2022 Jun. 8 [cited 2024 Dec. 9];3(3):0308062 1-5. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/6276