| |
Record |
Links |
|
Author  |
Alvarado, F.; Alvarez-Ruso, L.; Hernandez, E.; Nieves, J.; Penalva, N. |
|
| |
Title |
The Λc → Λ ℓ+ ν ℓ weak decay including new physics |
Type |
Journal Article |
| |
Year |
2024 |
Publication |
Journal of High Energy Physics |
Abbreviated Journal |
J. High Energy Phys. |
|
| |
Volume |
10 |
Issue |
10 |
Pages |
137 - 24pp |
|
| |
Keywords |
Semi-Leptonic Decays; Effective Field Theories of QCD; Properties of Hadrons; SMEFT |
|
| |
Abstract |
We investigate the Lambda(c) -> Lambda & ell;(+)nu(& ell;) decay with a focus on potential new physics (NP) effects in the & ell; = μchannel. We employ an effective Hamiltonian within the framework of the Standard Model Effective Field Theory (SMEFT) to consider generalized dimension-6 semileptonic c -> s operators of scalar, pseudoscalar, vector, axial-vector and tensor types. We rely on Lattice QCD (LQCD) for the hadronic transition form factors, using heavy quark spin symmetry (HQSS) to determine those that have not yet been obtained on the lattice. Uncertainties due to the truncation of the NP Hamiltonian and different implementations of HQSS are taken into account. As a result, we unravel the NP discovery potential of the Lambda(c) -> Lambda semileptonic decay in different observables. Our findings indicate high sensitivity to NP in lepton flavour universality ratios, probing multi-TeV scales in some cases. On the theoretical side, we identify LQCD uncertainties in axial and vector form factors as critical for improving NP sensitivity, alongside better SMEFT uncertainty estimations. |
|
| |
Address |
[Alvarado, Fernando; Alvarez-Ruso, Luis; Nieves, Juan] Inst Fis Corpuscular IFIC, Ctr Mixto CSIC UV, Dept Fis Teor, C-Catedrat Jose Beltran 2, E-46980 Paterna, Valencia, Spain, Email: fernando.alvarado@ific.uv.es; |
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Springer |
Place of Publication |
|
Editor |
|
|
| |
Language |
English |
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
1029-8479 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
WOS:001339537500002 |
Approved |
no |
|
| |
Is ISI |
yes |
International Collaboration |
no |
|
| |
Call Number |
IFIC @ pastor @ |
Serial |
6304 |
|
| Permanent link to this record |
