Zobrazeno 1 - 10
of 218
pro vyhledávání: '"Cvetič, Gorazd"'
Autor:
Ayala, Cesar, Cvetic, Gorazd
Publikováno v:
JHEP12(2024)075
We construct a QCD coupling ${\mathcal{A}}(Q^2)$ in the Effective Charge (ECH) scheme of the canonical part $d(Q^2)$ of the (inelastic) polarised Bjorken Sum Rule (BSR) ${\overline \Gamma}_1^{{\rm p-n}}(Q^2)$. In the perturbative domain, the coupling
Externí odkaz:
http://arxiv.org/abs/2410.00220
Approximate knowledge of the renormalon structure of the Bjorken polarised sum rule (BSR) ${\overline \Gamma}_1^{{\rm p-n}}(Q^2)$ leads to the corresponding BSR characteristic function that allows us to evaluate the leading-twist part of BSR. In our
Externí odkaz:
http://arxiv.org/abs/2312.13134
Autor:
Cvetic, Gorazd, Kim, C. S.
Publikováno v:
JHEP02(2024)215
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 lepton n
Externí odkaz:
http://arxiv.org/abs/2309.14281
Publikováno v:
Phys.Lett.B 848 (2024) 138386
We use the known renormalon structure of Bjorken polarised sum rule (BSR) ${\overline \Gamma}_1^{p-n}(Q^2)$ 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 th
Externí odkaz:
http://arxiv.org/abs/2309.12539
Publikováno v:
J.Phys.G 50 (2023) 045004 (40pp)
We perform numerical analysis of double-pinched Borel-Laplace QCD sum rules for the strangeless semihadronic $\tau$-decay data. The $D=0$ contribution to the theoretical contour integral in the sum rules is evaluated by the (truncated) Fixed Order pe
Externí odkaz:
http://arxiv.org/abs/2206.05631
Double-pinched Borel-Laplace sum rules are applied to ALEPH $\tau$-decay data. For the leading-twist ($D=0$) Adler function a renormalon-motivated extension is used, and the 5-loop coefficient is taken to be $d_4=275 \pm 63$. Two $D=6$ terms appear i
Externí odkaz:
http://arxiv.org/abs/2202.13178
Publikováno v:
Eur.Phys.J.C82(2022)362
We use improved truncated Operator Product Expansion (OPE) for the Adler function, involving two types of terms with dimension $D=6$, in the double-pinched Borel-Laplace Sum Rules and Finite Energy Sum Rules for the V+A channel strangeless semihadron
Externí odkaz:
http://arxiv.org/abs/2112.01992
Publikováno v:
Journal of High Energy Physics 2022, 168 (2022)
We investigate rare decays of Higgs via exchange of two almost degenerate heavy on-shell Majorana neutrinos $N_j$ ($j=1,2$): $\Gamma_{\pm} = \Gamma(h \to \nu_k N_j \to \nu_k \ell^{\pm} \pi^{\mp})$, and into the open quark channels $\Gamma_{\pm} = \Ga
Externí odkaz:
http://arxiv.org/abs/2110.08799
Publikováno v:
In Nuclear and Particle Physics Proceedings April 2024 343:94-98
Publikováno v:
Eur.Phys.J.C 81 (2021) 10, 930
We present a determination of the perturbative QCD (pQCD) coupling using the V+A channel ALEPH $\tau$-decay data. The determination involves the double-pinched Borel-Laplace Sum Rules and Finite Energy Sum Rules. The theoretical basis is the Operator
Externí odkaz:
http://arxiv.org/abs/2105.00356