Zobrazeno 1 - 10
of 232
pro vyhledávání: '"Piscopo, Maria"'
We provide an overview of the current experimental and theoretical status of charm CP violation and discuss recent progress in obtaining a Standard Model prediction for $\Delta a_{\rm CP}^{\rm dir}$ using the framework of light-cone sum rules. Furthe
Externí odkaz:
http://arxiv.org/abs/2403.02267
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 within
Externí odkaz:
http://arxiv.org/abs/2312.13245
Autor:
Piscopo, Maria Laura, Rusov, Aleksey
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-factorisable s
Externí odkaz:
http://arxiv.org/abs/2307.07594
Autor:
Piscopo, Maria Laura
We present the theoretical status of the lifetimes of weakly decaying heavy hadrons containing a bottom or a charm quark, and discuss the current predictions, based on the framework of the Heavy Quark Expansion (HQE), for both mesons and baryons. Pot
Externí odkaz:
http://arxiv.org/abs/2302.14590
Autor:
Gratrex, James, Lenz, Alexander, Melić, Blaženka, Nišandžić, Ivan, Piscopo, Maria Laura, Rusov, Aleksey V.
In the 1990s, very low experimental values for the lifetime ratio $\tau (\Lambda_b)/\tau(B_d)$ 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:
http://arxiv.org/abs/2301.07698
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) effects in
Externí odkaz:
http://arxiv.org/abs/2211.02724
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:
http://arxiv.org/abs/2208.02643
Autor:
Piscopo, Maria Laura
In this work we discuss the theoretical status for the study of the lifetime of heavy hadrons. After presenting some introductory topics like the effective weak Hamiltonian and the heavy quark effective theory (HQET), we describe the construction of
Externí odkaz:
http://arxiv.org/abs/2112.03137
Autor:
King, Daniel, Lenz, Alexander, Piscopo, Maria Laura, Rauh, Thomas, Rusov, Aleksey V., Vlahos, Christos
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:
http://arxiv.org/abs/2109.13219