Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Laura Piscopo"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-21 (2024)
Abstract Motivated by the recent measurements of CP violating effects in singly Cabibbo suppressed D 0 decays, we revisit the theoretical predictions of these channels. Using up-to-date values for the decay constants and form factors, we find already
Externí odkaz:
https://doaj.org/article/aba65548acbc4f4cbf4b2930a2c63ba7
Autor:
Maria Laura Piscopo, Aleksey V. Rusov
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-42 (2023)
Abstract In light of the current discrepancies between the recent predictions based on QCD factorisation (QCDF) and the experimental data for several non-leptonic colour-allowed two-body B-meson decays, we obtain new determinations of the non-factori
Externí odkaz:
https://doaj.org/article/fc37720c7700499abb9c98cad99b19c0
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-27 (2023)
Abstract Inspired by the recently observed tensions between the experimental data and the theoretical predictions, based on QCD factorisation, for several colour-allowed non-leptonic B-meson decays, we study the potential size of new physics (NP) eff
Externí odkaz:
https://doaj.org/article/ab105a4fbd754c938a93d3dd4e44d47b
Autor:
James Gratrex, Alexander Lenz, Blaženka Melić, Ivan Nišandžić, Maria Laura Piscopo, Aleksey V. Rusov
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 4, Pp 1-36 (2023)
Abstract In the 1990s, very low experimental values for the lifetime ratio τ(Λ b )/τ(B d ) triggered a considerable amount of doubt in the applicability of the heavy quark expansion (HQE), which is based on the assumption of quark-hadron duality (
Externí odkaz:
https://doaj.org/article/e7f2e9cce08c4e75a9df008d681f992a
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-34 (2023)
Abstract We update the Standard Model (SM) predictions for B-meson lifetimes within the heavy quark expansion (HQE). Including for the first time the contribution of the Darwin operator, SU(3) F breaking corrections to the matrix element of dimension
Externí odkaz:
https://doaj.org/article/c43753d155d2449da342e76f751b3d88
Autor:
Daniel King, Alexander Lenz, Maria Laura Piscopo, Thomas Rauh, Aleksey V. Rusov, Christos Vlahos
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-52 (2022)
Abstract Determining for the first time the Darwin operator contribution for the non-leptonic charm-quark decays and using new non-perturbative results for the matrix elements of ∆C = 0 four-quark operators, including eye-contractions, we present a
Externí odkaz:
https://doaj.org/article/3e7ddea5154a4fc2b5e890783e2f91ac
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 12, Pp 1-28 (2020)
Abstract We compute the Darwin operator contribution ( 1 / m b 3 $$ 1/{m}_b^3 $$ correction) to the width of the inclusive non-leptonic decay of a B meson (B +, B d or B s ), stemming from the quark flavour-changing transition b → q 1 q ¯ 2 q 3 $$
Externí odkaz:
https://doaj.org/article/2efd7764579942ffb5f8001b681cbebd
Publikováno v:
Journal of High Energy Physics
We update the Standard Model (SM) predictions for $B$-meson lifetimes within the heavy quark expansion (HQE). Including for the first time the contribution of the Darwin operator, SU(3)$_F$ breaking corrections to the matrix element of dimension-six
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccf5f95cdc990bf37c9a15465b16ccdb
Autor:
Daniel King, Alexander Lenz, Maria Laura Piscopo, Thomas Rauh, Aleksey V. Rusov, Christos Vlahos
Publikováno v:
Journal of High Energy Physics
Journal of High Energy Physics, 2022, Vol.2022(8) [Peer Reviewed Journal]
Journal of High Energy Physics, 2022, Vol.2022(8) [Peer Reviewed Journal]
Determining for the first time the Darwin operator contribution for the non-leptonic charm-quark decays and using new non-perturbative results for the matrix elements of $\Delta C=0$ four-quark operators, including eye-contractions, we present a comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21794dbb0baf39a3868e008ddd9e2819
Publikováno v:
Physical Review
A naive application of the heavy quark expansion (HQE) yields theory estimates for the decay rate of neutral D mesons that are 4 orders of magnitude below the experimental determination. It is well known that this huge suppression results from severe