Results 31 to 40 of about 25,070 (157)

$K \rightarrow \pi \ell^+ \ell^-$ form factor in the Large-N$_c$ and cut-off regularization method

, 2016
Bardeen-Buras-G\'{e}rard have proposed a large N$_c$ method to evaluate hadronic weak matrix elements to attack for instance the determination of the $\Delta I= \frac{1}{2}$-rule and $\mathrm{Re}(\frac{\epsilon'}{\epsilon})$.
D'Ambrosio, G., Greynat, D., Leskow, E. Coluccio, Nath, A.   +3 more
core   +1 more source

Matrix elements of four-quark operators and \Delta L=2 hyperon decays [PDF]

, 2013
The study of neutrinoless double beta decays of nuclei and hyperons require the calculation of hadronic matrix elements of local four-quark operators that change the total charge by two units \Delta Q=2 .
Barbero, C., Castro, G. Lopez, Li, Ling-Fong, Mariano, A.   +3 more
core   +2 more sources

Can one detect new physics in I=0 and/or I=2 contributions to the decays B --> pi pi? [PDF]

, 2005
We study the effects of new-physics contributions to B --> pi pi decays, which can be parametrized as four new complex quantities. A simple analysis is provided by utilizing the reparametrization invariance of the decay amplitudes.
Baek, Seungwon, Botella, F. J., London, David, Silva, Joao P.   +3 more
core   +3 more sources

The charm of 331

Journal of High Energy Physics, 2021
We perform a detailed analysis of flavour changing neutral current processes in the charm sector in the context of 331 models. As pointed out recently, in the case of Z′ contributions in these models there are no new free parameters beyond those already ...
Andrzej J. Buras, Pietro Colangelo, Fulvia De Fazio, Francesco Loparco   +3 more
doaj   +1 more source

The Purely Leptonic and Semileptonic Decays of Ds∗ Meson

Advances in High Energy Physics, Volume 2026, Issue 1, 2026.
With the potential prospects of the Ds∗ at high‐luminosity heavy‐flavor experiments in the future, we investigated the CKM‐favored and tree‐dominated leptonic Ds∗⟶ℓν¯ℓ,ℓ=e,μ,τ and semileptonic Ds∗⟶Mℓ′ν¯ℓ′ M=ϕ,η′,K and ℓ′=e,μ weak decays in the standard model (SM).
Xiao-Lin Wang, Rui Sun, Li-Ting Wang, Roelof Bijker   +3 more
wiley   +1 more source

Exploratory calculation of the rare hyperon decay Σ+ → pℓ + ℓ − from lattice QCD

Journal of High Energy Physics
The rare hyperon decay Σ+ → pℓ + ℓ − is a flavour-changing neutral current process mediated by an s → d transition that occurs only at loop level within the Standard Model.
Felix Erben, Vera Gülpers, Maxwell T. Hansen, Raoul Hodgson, Antonin Portelli   +4 more
doaj   +1 more source

Precision calculations of B d,s → π, K decay form factors in soft-collinear effective theory

Journal of High Energy Physics, 2023
We improve QCD calculations of the semileptonic B d,s → π, K decay form factors at large hadronic recoil by implementing the next-to-leading-logarithmic resummation for the obtained leading-power light-cone sum rules in the soft-collinear effective ...
Bo-Yan Cui, Yong-Kang Huang, Yue-Long Shen, Chao Wang, Yu-Ming Wang   +4 more
doaj   +1 more source

Radiation Transport Through the Martian Atmosphere as a Function of the Zenith Angle

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract The topographic influence of the radiation environment on the Martian surface radiation is crucial for future human exploration. Topographic maps help assess radiation flux variations, aiding in hazard evaluation. Creating a global radiation map requires accounting for seasonally varying atmospheric density, heliospheric modulation, and ...
Salman Khaksari, Phillip H. Phipps, Robert F. Wimmer‐Schweingruber, Timothy J. Stubbs, Mark D. Looper, Jingnan Guo, Gabin Charpentier, Bent Ehresmann, Jan Leo Löwe, Daniel Matthiä, Donald M. Hassler, Cary Zeitlin, Sven Löffler   +12 more
wiley   +1 more source

Electroweak three-body decays in the presence of two- and three-body bound states

Journal of High Energy Physics
Recently, formalism has been derived for studying electroweak transition amplitudes for three-body systems both in infinite and finite volumes. The formalism provides exact relations that the infinite-volume amplitudes must satisfy, as well as a ...
Raul A. Briceño, Andrew W. Jackura, Dimitra A. Pefkou, Fernando Romero-López   +3 more
doaj   +1 more source

QED factorization of non-leptonic B decays

Journal of High Energy Physics, 2020
We show that the QCD factorization approach for B-meson decays to charmless hadronic two-body final states can be extended to include electromagnetic corrections.
Martin Beneke, Philipp Böer, Jan-Niklas Toelstede, K. Keri Vos   +3 more
doaj   +1 more source