Zobrazeno 1 - 10
of 3 425
pro vyhledávání: '"axial-vector: coupling"'
We discuss the hadronic structure-dependent radiative corrections to the axial-vector coupling that controls single-nucleon weak charged-current processes -- commonly denoted by $g_A$. We match the Standard Model at the GeV scale onto chiral perturba
Externí odkaz:
http://arxiv.org/abs/2410.21404
Publikováno v:
Phys. Rev. D 108 (2023) 074024
The nucleon axial-vector coupling constant $g_A$ is studied in the presence of an external magnetic field, and in dense nuclear environments, to emulate nuclear matter in magnetars. For this purpose we use QCD finite energy sum rules for two-current
Externí odkaz:
http://arxiv.org/abs/2308.05663
Autor:
Märkisch, Bastian, Mest, Holger, Saul, Heiko, Wang, Xiangzun, Abele, Hartmut, Dubbers, Dirk, Klopf, Michael, Petoukhov, Alexander, Roick, Christoph, Soldner, Torsten, Werder, Dominik
Publikováno v:
Phys. Rev. Lett. 122, 242501 (2019)
We present a precision measurement of the axial-vector coupling constant $g_A$ in the decay of polarized free neutrons. For the first time, a pulsed cold neutron beam was used for this purpose. By this method, leading sources of systematic uncertaint
Externí odkaz:
http://arxiv.org/abs/1812.04666
Publikováno v:
Phys.Rev. C97 (2018) no.3, 034315
An improved formalism of the two-neutrino double-beta decay ($2\nu\beta\beta$-decay) rate is presented, which takes into account the dependence of energy denominators on lepton energies via the Taylor expansion. Till now, only the leading term in thi
Externí odkaz:
http://arxiv.org/abs/1804.04227
Autor:
Suhonen, Jouni
Publikováno v:
Frontiers in Physics 5 (2017) 55
In this review the quenching of the weak axial-vector coupling strength, $g_{\rm A}$, is discussed in nuclear $\beta$ and double-$\beta$ decays. On one hand, the nuclear-medium and nuclear many-body effects are separated, and on the other hand the qu
Externí odkaz:
http://arxiv.org/abs/1712.01565
Autor:
Rho, Mannque
The in-medium property of the axial-vector coupling constant $g_A$ in nuclei and dense baryonic matter, a long standing problem in nuclear physics, is reformulated in terms of the recently constructed scale-invariant hidden local symmetric ($bs$HLS)
Externí odkaz:
http://arxiv.org/abs/1705.10864
Autor:
Singh, Janardan P.
We have analyzed axial-vector current-current correlation functions between one-nucleon states to calculate the singlet axial-vector coupling constant of the nucleon. The octet-octet and the octet-singlet current correlators, investigated in this wor
Externí odkaz:
http://arxiv.org/abs/1507.05289
Autor:
Maerkisch, Bastian, Abele, Hartmut
The matrix element \Vud of the CKM matrix can be determined by two independent measurements in neutron decay: the neutron lifetime $\tau_n$ and the ratio of coupling constants $\lambda=g_A/g_V$, which is most precisely determined by measurements of t
Externí odkaz:
http://arxiv.org/abs/1410.4220
Publikováno v:
Phys. Rev. D 87, 054001 (2013)
We analyze the impact of effective axial-vector coupling of the gluon on spin polarization observables in $t\bar{t}$ pair production at the LHC. Working at leading order in QCD, we compute the $t\bar{t}$ spin-correlation and left-right spin asymmetry
Externí odkaz:
http://arxiv.org/abs/1212.3272
Publikováno v:
Phys.Rev. D85 (2012) 074021
We study different top quark charge asymmetries and the variation of $t\bar t$ total cross section induced by the effective axial-vector coupling of gluon in the LHC experiments. We show that rapidity cut-dependent asymmetries are more sensitive to t
Externí odkaz:
http://arxiv.org/abs/1112.5885