CP violation in non-leptonic B decays as a portal to New Physics

Fleischer, Robert

doi:10.22323/1.405.0008

Proceedings of 7th Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2020-2021 — PoS(DISCRETE2020-2021) 2022

DOI: 10.22323/1.405.0008

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CP violation in non-leptonic B decays as a portal to New Physics

Robert Fleischer¹

Abstract: CP violation offers a powerful probe for testing the Standard Model. In this endeavour, nonleptonic decays of B mesons play a key role. I will discuss benchmark decays and puzzling patterns emerging from theoretical analyses of the current data.

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Cited by 2 publications

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Fingerprinting CP-violating New Physics with B → Kμ+μ−

Fleischer

Malami

Rehult

et al. 2023

J. High Energ. Phys.

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The B → Kℓ+ℓ− system is particularly interesting to explore physics beyond the Standard Model. Such effects could provide new sources of CP violation, thereby giving rise to Wilson coefficients which could not only be real, as assumed in most analyses, but also be complex. We propose a new strategy to extract the complex C9μ, C10μ from the data, utilising the complementarity of direct CP violation in B+ → K+μ+μ− and mixing-induced CP violation arising — in addition to direct CP violation — in $$ {B}_d^0\to {K}_S{\mu}^{+}{\mu}^{-} $$ B d 0 → K S μ + μ − , as well as the differential rate in appropriate q2 bins. The long-distance effects, which play a key role to generate the direct CP asymmetries, cannot be reliably calculated due to their non-perturbative nature. In order to describe them, we apply a model by the LHCb Collaboration employing experimental data. Assuming specific scenarios, we demonstrate the fingerprinting of CP-violating New Physics and the distinction between ambiguities in the model of the long-distance contributions. Finally, New Physics could couple differently to muons and electrons, as probed through the lepton flavour universality ratio RK. We discuss these effects in the presence of CP violation and present a new way to measure the direct CP asymmetries of the B → Ke+e− channels.

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Fingerprinting CP-violating New Physics with B → Kμ+μ−

Fleischer

Malami

Rehult

et al. 2023

J. High Energ. Phys.

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Study of exclusive decays of Bs→ψ(1S,2S)Ks
Nayak,
Patnaik,
Sadangi
et al. 2024
Phys. Rev. D
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We analyze the exclusive two-body nonleptonic decays of Bs meson to ground as well as radially excited 2S charmonium state with a light meson Ks, induced by the b→cc¯d transition. Within the framework of relativistic independent quark model based on a flavor-independent interaction potential in scalar-vector harmonic form, we calculate the weak form factors from the overlapping integrals of meson wave function obtained in this model. Using the factorization approximation, we predict the branching fractions for the Bs→ψ(1S,2S)Ks and Bs→ηc(1S,2S)Ks, which can be compared with future theoretical predictions. Branching fraction for Bs→J/ψKs decay is found to be in good agreement with the data from the LHCb collaboration, whereas for Bs→ψ(2S)Ks, it is found to be within the detection ability of the CMS collaboration. We also predict the ratios of branching fractions (R), which are in broad agreement with the data from LHCb collaboration. These results indicate that the present approach works well in the description of exclusive nonleptonic Bs decays within the framework of the relativistic independent quark model. Published by the American Physical Society 2024

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CP violation in non-leptonic B decays as a portal to New Physics

Abstract: CP violation offers a powerful probe for testing the Standard Model. In this endeavour, nonleptonic decays of B mesons play a key role. I will discuss benchmark decays and puzzling patterns emerging from theoretical analyses of the current data.

Cited by 2 publications

References 40 publications

Fingerprinting CP-violating New Physics with B → Kμ+μ−

Fingerprinting CP-violating New Physics with B → Kμ+μ−

Study of exclusive decays of Bs→ψ(1S,2S)Ks
Nayak,
Patnaik,
Sadangi
et al. 2024
Phys. Rev. D
0
0
0
0
View full text Add to dashboard Cite

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CP violation in non-leptonic B decays as a portal to New Physics

Abstract: CP violation offers a powerful probe for testing the Standard Model. In this endeavour, nonleptonic decays of B mesons play a key role. I will discuss benchmark decays and puzzling patterns emerging from theoretical analyses of the current data.

Cited by 2 publications

References 40 publications

Fingerprinting CP-violating New Physics with B → Kμ+μ−

Fingerprinting CP-violating New Physics with B → Kμ+μ−

Study of exclusive decays of Bs→ψ(1S,2S)KsNayak, Patnaik, Sadangi et al. 2024Phys. Rev. D0000View full textAdd to dashboardCite

Contact Info

Product

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About

Study of exclusive decays of Bs→ψ(1S,2S)Ks
Nayak,
Patnaik,
Sadangi
et al. 2024
Phys. Rev. D
0
0
0
0
View full text Add to dashboard Cite