Rare radiative charm decays in the standard model and beyond

Boer, Stefan de

doi:10.22323/1.314.0209

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…The NP scenarios discussed in Ref. [257] can contribute at the loop level to C eff 7,8 , and cannot significantly modify the branching ratios. However, the NP induced CPV asymmetry was found to still be modest, e.g., ∼ O(10%) for D 0 → ρ 0 γ.…”

Section: Radiative Decaysmentioning

confidence: 95%

“…The GIM mechanism suppresses strongly C eff 8 in the SM. The experimental branching ratio for the Cabibbo allowed decay is [243,257]. The NP scenarios discussed in Ref.…”

Section: Radiative Decaysmentioning

confidence: 99%

“…The forward-backward asymmetry of photon momentum relative to Λ c boost probes the handedness of c → uγ transitions. It can be 0.2 in the SM, and somewhat smaller within scenarios of NP discussed in [243,257]. The probes of photon polarization include time-dependent analysis in D 0 , D0 → V γ, where V = ρ − , K 0 , φ, or an up-down asymmetry in D (s) → K 1 (→ Kππ)γ [258].…”

Section: Radiative Decaysmentioning

confidence: 99%

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Opportunities in Flavour Physics at the HL-LHC and HE-LHC

Cerri,

Gligorov,

Malvezzi

et al. 2018

Preprint

117

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Motivated by the success of the flavour physics programme carried out over the last decade at the Large Hadron Collider (LHC), we characterize in detail the physics potential of its High-Luminosity and High-Energy upgrades in this domain of physics. We document the extraordinary breadth of the HL/HE-LHC programme enabled by a putative Upgrade II of the dedicated flavour physics experiment LHCb and the evolution of the established flavour physics role of the ATLAS and CMS general purpose experiments. We connect the dedicated flavour physics programme to studies of the top quark, Higgs boson, and direct high-p T searches for new particles and force carriers. We discuss the complementarity of their discovery potential for physics beyond the Standard Model, affirming the necessity to fully exploit the LHC's flavour physics potential throughout its upgrade eras.

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Section: Radiative Decaysmentioning

confidence: 95%

“…The GIM mechanism suppresses strongly C eff 8 in the SM. The experimental branching ratio for the Cabibbo allowed decay is [243,257]. The NP scenarios discussed in Ref.…”

Section: Radiative Decaysmentioning

confidence: 99%

Section: Radiative Decaysmentioning

confidence: 99%

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Opportunities in Flavour Physics at the HL-LHC and HE-LHC

Cerri,

Gligorov,

Malvezzi

et al. 2018

Preprint

117

View full text Add to dashboard Cite

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Weak radiative decay $$\Lambda _{c}^{+}\rightarrow \Sigma ^{+}\gamma $$ using light-cone sum rules

2023

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We calculate the decay width of the $$\Lambda _{c}^{+}\rightarrow \Sigma ^{+}\gamma $$ Λ c + → Σ + γ using light-cone sum rules. For the initial quark radiation an effective Hamiltonian is constructed, where the internal quark line shrinks to a point. The final quark radiation is studied within the full theory. The leading twist light-cone distribution amplitudes of the $$\Sigma ^+$$ Σ + serve as the non-perturbative input for the sum rules calculation, and the perturbative kernel is calculated at leading order. The branching fraction we obtain is $$\mathcal{B}(\Lambda _{c}^{+}\rightarrow \Sigma ^{+}\gamma )=1.03\pm 0.36 \times 10^{-4}$$ B ( Λ c + → Σ + γ ) = 1.03 ± 0.36 × 10 - 4 , which is below the recent upper limits $$<2.6 \times 10^{-4}$$ < 2.6 × 10 - 4 and $$<4.4 \times 10^{-4}$$ < 4.4 × 10 - 4 given by the Belle collaboration and the BESIII collaboration, respectively.

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Rare radiative charm decays in the standard model and beyond

Cited by 2 publications

References 14 publications

Opportunities in Flavour Physics at the HL-LHC and HE-LHC

Opportunities in Flavour Physics at the HL-LHC and HE-LHC

Weak radiative decay $$\Lambda _{c}^{+}\rightarrow \Sigma ^{+}\gamma $$ using light-cone sum rules

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