Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Gorazd Cvetič"'
Autor:
Gorazd Cvetič, C. S. Kim
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-19 (2024)
Abstract We investigate rare decays of tau leptons that occur via exchange of heavy on-shell neutrinos N j (j = 1, 2). These neutrinos can be either Dirac or Majorana, and are considered to be almost degenerate in mass. The decays can thus be either
Externí odkaz:
https://doaj.org/article/bbac74b5a3114031a8d1613ad0866801
Publikováno v:
Physics Letters B, Vol 848, Iss , Pp 138386- (2024)
We use the known renormalon structure of Bjorken polarised sum rule (BSR) Γ‾1p−n(Q2) to evaluate the leading-twist part of that quantity. In addition, we include D=2 and D=4 Operator Product Expansion (OPE) terms and fit this expression to avail
Externí odkaz:
https://doaj.org/article/d77973461286411ab139da6ff15ab7d8
Publikováno v:
Quantum Reports, Vol 5, Iss 1, Pp 198-223 (2023)
We consider a simple model for QCD dynamics in which DGLAP integro-differential equation may be solved analytically. This is a gauge model which possesses dominant evolution of gauge boson (gluon) distribution and in which the gauge coupling does not
Externí odkaz:
https://doaj.org/article/19701b91c228421baef19f49c9489080
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 4, Pp 1-16 (2022)
Abstract We use improved truncated operator product expansion (OPE) for the Adler function, involving two types of terms with dimension $$D=6$$ D = 6 , in the double-pinched Borel–Laplace sum rules and finite energy sum rules for the V + A channel
Externí odkaz:
https://doaj.org/article/37df22d63de1498e905d2abb2922b7fa
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-29 (2022)
Abstract We investigate rare decays of Higgs via exchange of two almost degenerate heavy on-shell Majorana neutrinos N j (j = 1, 2): Γ ± = Γ(h → ν k N j → ν k ℓ ± π ∓), and into the open quark channels Γ ± = Γ(h → ν k N j → ν
Externí odkaz:
https://doaj.org/article/79703287b1ac4b649120d8870b3f7d17
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 10, Pp 1-32 (2021)
Abstract We present a determination of the perturbative QCD (pQCD) coupling using the V+A channel ALEPH $$\tau $$ τ -decay data. The determination involves the double-pinched Borel–Laplace Sum Rules and Finite Energy Sum Rules. The theoretical bas
Externí odkaz:
https://doaj.org/article/0fd0c647a759414788883263a8637a7e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 11, Pp 1-15 (2020)
Abstract In this article we study the rare B-meson decay via two on-shell almost-degenerate Majorana Heavy Neutrinos, into two charged leptons and two pseudoscalar mesons ( $$B^{\pm } \rightarrow D^0 \ell ^{\pm }_1 \ell ^{\pm }_2 \pi ^{\mp }$$ B ±
Externí odkaz:
https://doaj.org/article/39210dd93d084dcf863857efdfe93e0c
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 10, Pp 1-17 (2020)
Abstract The disagreement between the standard model prediction and the experimental measurement of muon anomalous magnetic moment can be alleviated by invoking an additional particle which is either a vector boson (X 1) or a scalar (X 0). This new p
Externí odkaz:
https://doaj.org/article/cac015d8cac1489685952c37e3094d6e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 12, Pp 1-25 (2018)
Abstract Experimental data obtained for the polarized Bjorken sum rule (BSR) $$\Gamma _1^{p-n}(Q^2)$$ Γ1p-n(Q2) are fitted by using predictions derived within a truncated operator product expansion (OPE) approach to QCD. Four QCD versions are consid
Externí odkaz:
https://doaj.org/article/199f490a37d14440b78ec8c6211be297
Publikováno v:
Symmetry, Vol 7, Iss 2, Pp 726-773 (2015)
Some of the outstanding questions of particle physics today concern the neutrino sector, in particular whether there are more neutrinos than those already known and whether they are Dirac or Majorana particles. There are different ways to explore the
Externí odkaz:
https://doaj.org/article/9b1629fb2060446096dec40b3a175a80