Rare decays of b and c hadrons

Altmannshofer, Wolfgang; Archilli, F.

doi:10.48550/arxiv.2206.11331

Cited by 7 publications

(8 citation statements)

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“…We note that the ratio R µµ is an excellent observable to probe the minimal flavour violation [53]. On the other side, the effective lifetime, τ µµ , can be used to discriminate between the contributions due to any possible new scalar and pseudoscalar mediators [53]. The measured values of the ratio of branching fractions, R µµ , is [49,50],…”

Section: Leptonic Decays Of Mesonsmentioning

confidence: 95%

“…The CMS has measured the effective lifetime, τ µµ , of the B s → µ + µ − decay [48]. We note that the ratio R µµ is an excellent observable to probe the minimal flavour violation [53]. On the other side, the effective lifetime, τ µµ , can be used to discriminate between the contributions due to any possible new scalar and pseudoscalar mediators [53].…”

Section: Leptonic Decays Of Mesonsmentioning

confidence: 99%

“…The three body flavour violating leptonic decays µ → 3e and µ → 3 where = e, µ provide additional tests of the dipole operators given in equation (53). Their decay width can be written as [23],…”

Section: µ → 3e and τ → 3µ Decaysmentioning

confidence: 99%

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Flavour bounds on the flavon of a minimal $\mathcal{Z}_2 \times \mathcal{Z}_N$ symmetry

Abbas¹,

Singh²,

Singh³

et al. 2022

Preprint

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We investigate the flavour bounds on the Z 2 ×Z 5 symmetry, a minimal form of the Z 2 ×Z N flavour symmetry, that can provide a simple set-up for the Froggatt-Nielsen mechanism. This minimal form is capable of explaining the fermionic masses and mixing pattern of the standard model including that of the neutrinos. The bounds on the parameter space of the flavon field of the Z 2 × Z 5 symmetry are derived using the current quark and lepton flavour physics data and future projected sensitivities of quark and lepton flavour effects. The strongest bounds on the flavon of the Z 2 × Z 5 symmetry come from the K 0 − K0 and D 0 − D0 mixing. In future phase-II of the LHCb, the ratio of the BR(B d → µ + µ − ) and BR(B s → µ + µ − ) branching fractions, R µµ , will be crucial in ruling out the major part of the flavon parameter space.

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Section: Leptonic Decays Of Mesonsmentioning

confidence: 95%

Section: Leptonic Decays Of Mesonsmentioning

confidence: 99%

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Flavour bounds on the flavon of a minimal $\mathcal{Z}_2 \times \mathcal{Z}_N$ symmetry

Abbas¹,

Singh²,

Singh³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The landscape of quark flavour physics experiments and facilities was summarized in Figure 1 of a recent Snowmass submission. 125 As things stand, the principal general-purpose flavour factories are LHCb and Belle 2, approved to collect around 50 fb −1 of pp and 50 ab −1 of ee collision data respectively by roughly the early 2030s. As discussed in the physics case for a second upgrade of LHCb, 126 their datasets are highly complementary.…”

Section: Future Experiments and Facilitiesmentioning

confidence: 99%

Quark flavor physics: Status and future prospects

Gligorov

2023

Int. J. Mod. Phys. A

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Quark flavour physics is the study of hadrons, their properties, and their decays into other particles. As a discipline it simultaneously catalogues the nature of physical states within the Standard Model of particle physics, and in doing so tests the consistency and completeness of the Standard Model's description of reality. Following the discovery of the Higgs field, it is more essential than ever to critically examine the Standard Model's own coherence. Precision studies of quark flavour are one of the most sensitive experimental instruments for this task. I give a brief and necessarily selective overview of recent developments in quark flavour physics and discuss prospects for the next generation of experiments and facilities, with an emphasis on the energy scales of beyond Standard Model physics probed by these types of measurements.

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“…Though the attention is understandably attracted these days by hints of violations of lepton universality in both penguin-mediated processes and in tree decays mostly reported by the LHCb, Belle and BaBar experiments (a companion white paper is addressing this question - [4], see also [5]), the discovery power of flavour physics lies, still and as well, in CP -conserving and CP -violating observables used to constrain the CKM matrix profile and the subsequent null-tests originating from these predictions. Figure 1 displays the state-of-the-art of the SM CKM profile.…”

Section: Importance Of Ckm Profile: a Pillar Of Smmentioning

confidence: 99%

High precision in CKM unitarity tests in $b$ and $c$ decays

Lenz¹,

Monteil²

2022

Preprint

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This article surveys the important questions attached to unitarity tests of the Cabibbo-Kobayashi-Maskawa matrix, with a focus on the direct determinations of the magnitude of CKM matrix elements. The current CKM anomalies are discussed and the clear-cut prospects at LHCb and Belle II envisaged. The anticipated precision on CP -conserving and CP -violating observables at the projected upgrades of the LHCb and Belle II experiments is examined from the point of view of the search for New Physics in B-meson mixing, addressing the bottlenecks in precision for the interpretation of the measurements for future experiments and highlighting the related theoretical and experimental challenges. The vibrant prospects at future e + e − colliders running at the Z 0 pole and W + W − are eventually discussed.

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Rare decays of b and c hadrons

Cited by 7 publications

References 0 publications

Flavour bounds on the flavon of a minimal $\mathcal{Z}_2 \times \mathcal{Z}_N$ symmetry

Flavour bounds on the flavon of a minimal $\mathcal{Z}_2 \times \mathcal{Z}_N$ symmetry

Quark flavor physics: Status and future prospects

High precision in CKM unitarity tests in $b$ and $c$ decays

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