Zobrazeno 1 - 10
of 139
pro vyhledávání: '"Svjetlana Fajfer"'
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-47 (2023)
Abstract We explore CP-violating (CPV) effects of heavy New Physics in flavour-changing quark dipole transitions, within the framework of Standard Model Effective Field Theory (SMEFT). First, we establish the relevant dimension six operators and cons
Externí odkaz:
https://doaj.org/article/c99e0e911ccf4dd5aac2c70dde06b9e9
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 7, Pp 1-29 (2023)
Abstract We present constraints on the left-handed dimension-6 interactions that contribute to semileptonic and leptonic decays of K, D, pions and to nuclear beta decay. We employ the flavour covariant description of the effective couplings, identify
Externí odkaz:
https://doaj.org/article/a11879b1c4af4d629363e93bafcec90b
Publikováno v:
Physics Letters B, Vol 840, Iss , Pp 137830- (2023)
This article is an addendum to Ref. [1]. We discuss the correlation of K0→π0νν¯ with the K+→π+νν¯ and B→hsνν¯ modes in the model for NP contributions discussed in Ref. [1].Report Number: BARI-TH/22-737
Externí odkaz:
https://doaj.org/article/d6b135a17e984741a24af64621dca1f7
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 5, Pp 1-17 (2022)
Abstract We study the impact of triple-leptoquark interactions on matter stability for two specific proton decay topologies that arise at the tree- and one-loop level if and when they coexist. We demonstrate that the one-loop level topology is much m
Externí odkaz:
https://doaj.org/article/aef811931b3243fb9b1ccf96294092fc
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 6, Pp 1-29 (2021)
Abstract We explore the interplay of New Physics (NP) effects in (g − 2) ℓ and h → ℓ + ℓ − within the Standard Model Effective Field Theory (SMEFT) framework, including one-loop Renormalization Group (RG) evolution of the Wilson coefficie
Externí odkaz:
https://doaj.org/article/7e68b5785219487c93b0566f1914475b
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-15 (2021)
Abstract We introduce a novel mechanism for the leptoquark pair production at LHC that is of a t-channel topology and is quark-quark initiated. This mechanism operates under fairly general conditions. One of them is that the two leptoquarks in questi
Externí odkaz:
https://doaj.org/article/93edd005ad5e405f8e4fb759ea685415
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 10, Pp 1-8 (2020)
Abstract We show that the current values of $$R_K^\mathrm {exp}$$ R K exp and $$R_{K^*}^\mathrm {exp}$$ R K ∗ exp can be accommodated by allowing a nonzero New Physics coupling $$\delta C_9^{\mu \mu }$$ δ C 9 μ μ to be complex, both in the scena
Externí odkaz:
https://doaj.org/article/196765cce0aa4923a0335f2f4f85c013
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 6, Pp 1-19 (2020)
Abstract The observed muon anomalous magnetic moment deviates from the Standard Model predictions. There are two scalar leptoquarks with simultaneous couplings to the quark-muon pairs of both chiralities that can singly explain this discrepancy. We d
Externí odkaz:
https://doaj.org/article/2a6cea14838c4fd583cd0b3255412c7d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 3, Pp 1-14 (2020)
Abstract We study the phenomenology of two leptoquarks, the Standard Model SU(2) singlets $$S_1$$ S1 and $$U_1$$ U1 , with regard to the latest experimental data from the low-energy flavor physics measurements, LHC, and the IceCube neutrino experimen
Externí odkaz:
https://doaj.org/article/340f0004d4ed408f971a87a95d650289
Autor:
F. C. Correia, Svjetlana Fajfer
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-30 (2019)
Abstract We consider experimental constraints in the MeV region in order to determine the parameter space for the U(1) X extension of the Standard Model, presented in the first part of our work. In particular, we focus on the model UV-completed by co
Externí odkaz:
https://doaj.org/article/c73644c2ea674b3c93ea40fe03ba3d17