First lattice calculation of radiative leptonic decay rates of pseudoscalar mesons

Desiderio, Antonio; Frezzotti, R.; Garofalo, Marco; Giusti, D.; Hansen, Martin; Lubicz, V.; Martinelli, G.; Sachrajda, C. T.; Sanfilippo, Francesco; Simula, Silvano; Tantalo, Nazario

doi:10.1103/physrevd.103.014502

Cited by 52 publications

(94 citation statements)

References 36 publications

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“…The strategies to control the electromagnetic corrections through LQCD studies exist and the first results for the leptonic decays of kaon appeared very recently in refs. [98,99] and the result is compatible with what we used in this paper.…”

Section: Jhep05(2021)175 7 Conclusionsupporting

confidence: 88%

New physics effects in leptonic and semileptonic decays

Bečirević

Jaffredo

Peñuelas

et al. 2021

J. High Energ. Phys.

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We discuss the possibilities of extracting the constraints on New Physics by using the current data on the leptonic and semileptonic decays of pseudoscalar mesons. In doing so we use a general low energy Lagrangian that besides the vector and axial operators also includes the (pseudo-)scalar and tensor ones. In obtaining constraints on New Physics couplings, we combine the experimental information concerning several decay modes with the accurate and precise lattice QCD results for the hadronic matrix elements. We propose to study new observables that can be extracted from the angular analysis of the semileptonic decays and discuss their values both in the Standard Model and in some specific scenarios of physics beyond the Standard Model.

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Section: Jhep05(2021)175 7 Conclusionsupporting

confidence: 88%

New physics effects in leptonic and semileptonic decays

Bečirević

Jaffredo

Peñuelas

et al. 2021

J. High Energ. Phys.

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“…form factors [33]. The fits to a linear and an extended pole model are in agreement with 20-30% D-spin breaking close to the kinematic endpoint.…”

Section: Comparison With Literature and Experimentssupporting

confidence: 63%

Radiative decays of heavy-light mesons and the $$ {f}_{H,{H}^{\ast },{H}_1}^{(T)} $$ decay constants

Pullin

Zwicky

2021

J. High Energ. Phys.

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The on-shell matrix elements, or couplings $$ {g}_{H{H}^{\ast}\left({H}_1\right)\upgamma} $$ g H H ∗ H 1 γ , describing the $$ B{(D)}_q^{\ast } $$ B D q ∗ → B(D)qγ and B1q → Bqγ (q = u, d, s) radiative decays, are determined from light-cone sum rules at next-to-leading order for the first time. Two different interpolating operators are used for the vector meson, providing additional robustness to our results. For the D*-meson, where some rates are experimentally known, agreement is found. The couplings are of additional interest as they govern the lowest pole residue in the B(D) → γ form factors which in turn are connected to QED-corrections in leptonic decays B(D) → ℓ$$ \overline{\nu} $$ ν ¯ . Since the couplings and residues are related by the decay constants $$ {f}_{H^{\ast}\left({H}_1\right)} $$ f H ∗ H 1 and $$ {f}_{H^{\ast}\left({H}_1\right)}^T $$ f H ∗ H 1 T , we determine them at next-leading order as a by-product. The quantities $$ \left\{{f}_{H^{\ast}}^T,{f}_{H_1}^T\right\} $$ f H ∗ T f H 1 T have not previously been subjected to a QCD sum rule determination. All results are compared with the existing experimental and theoretical literature.

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“…While this is practicable for the decays of pions and kaons, particularly into muons for which the rate for large E γ is suppressed [15], this is not the case for the decays of heavy mesons. More recently, we have demonstrated that the structure-dependent contributions to Γ 1 can be calculated [30,32], thus extending the framework to the decays of heavy mesons.…”

Section: Infrared Divergences In Lattice Computations Of Radiative Comentioning

confidence: 94%

Future Tests of Parton Distributions

Cruz-Martinez¹,

Forte²,

Nocera³

2021

Acta Phys. Pol. B

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The remarkable recent progress in the precision of Lattice QCD computations for several physical quantities relevant for flavour physics has motivated the introduction of isospin-breaking effects, including in particular electromagnetic corrections, to the computations. The isospin-breaking corrections are necessary to fully exploit this improved precision for the determination of the fundamental parameters of the Standard Model, including the CKM matrix elements, and to look for deviations from experimental measurements which might signal the presence of New Physics. Together with colleagues from Rome, we have developed and implemented a framework for including isospin-breaking corrections in leptonic decays P → ν (γ), where P is a pseudoscalar meson and a charged lepton, and the theoretical framework and numerical results are reviewed below. The status of our studies to extend this framework to semileptonic decays P 1 → P 2 ν (γ), where P 1,2 are pseudoscalar mesons, is also presented.

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First lattice calculation of radiative leptonic decay rates of pseudoscalar mesons

Cited by 52 publications

References 36 publications

New physics effects in leptonic and semileptonic decays

New physics effects in leptonic and semileptonic decays

Radiative decays of heavy-light mesons and the $$ {f}_{H,{H}^{\ast },{H}_1}^{(T)} $$ decay constants

Future Tests of Parton Distributions

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