Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Sanchez-Puertas, Pablo"'
We employ a dispersion relation that allows to recover the phase of the electromagnetic form factor of the pion from its absolute value above threshold. Compared to alternative approaches building on the phase, this approach builds on experimental in
Externí odkaz:
http://arxiv.org/abs/2403.07121
Pseudoscalar meson dominance has implications for nucleon structure which follow from an Extended Partial Conservation of the Axial Current (EPCAC). The minimal resonance saturation of the nucleon pseudoscalar form factor of the lowest pseudoscalar a
Externí odkaz:
http://arxiv.org/abs/2306.05267
Publikováno v:
JHEP 12 (2022) 001
It has been pointed out recently that a certain set of dimension-6 scalar $P$- and $CP$-violating light-quark-muon operators may be tested in $\eta$ and $\eta'$ decays to various final states involving $\mu^+\mu^-$ pairs, at a level not yet excluded
Externí odkaz:
http://arxiv.org/abs/2210.14925
Publikováno v:
J. High Energ. Phys. 2022, 147 (2022)
In this work we investigate the prospect of observing new-physics signatures via $C\!P$ violation in $\eta^{(\prime)}\to\pi^0\mu^+\mu^-$ and $\eta^\prime\to\eta\mu^+\mu^-$ decays at the REDTOP experiment. We make use of the SMEFT to parametrise the n
Externí odkaz:
http://arxiv.org/abs/2202.04886
The baryonic form factor of charged pions is studied in detail in the Nambu--Jona-Lasinio model with constituent quarks, where the spontaneously broken chiral symmetry is the key dynamical ingredient guaranteeing the would-be Goldstone boson nature o
Externí odkaz:
http://arxiv.org/abs/2112.11049
Publikováno v:
Phys. Rev. D 105, 016017 (2022)
We revisit the contribution of axial-vector mesons to the hyperfine splitting of muonic hydrogen. We focus our attention on the doubly-virtual asymptotic behavior of the relevant form factors of axial-vector mesons, together with their coupling to nu
Externí odkaz:
http://arxiv.org/abs/2110.11366
The baryon form factor of charged pions arises since isospin symmetry is broken with unequal up and down quark masses, $m_d>m_u$, as well as electromagnetic effects. We obtain estimates for this basic property in two phenomenological ways: from simpl
Externí odkaz:
http://arxiv.org/abs/2103.09131
Publikováno v:
J. Phys. G: Nucl. Part. Phys. 49 015002 (2022)
We revisit well-known short-distance constraints relating the hadronic light-by light Green's function to the $\langle VVA \rangle$ one, that have been a subject of debate over the past years in the context of the muon $(g-2)$. Specifically, we ident
Externí odkaz:
http://arxiv.org/abs/2005.11761
Autor:
Roig, Pablo, Sanchez-Puertas, Pablo
Publikováno v:
Phys. Rev. D 101, 074019 (2020)
In this work we study the axial contributions to the hadronic light-by-light piece of the muon anomalous magnetic moment using the framework of resonance chiral theory. As a result, we obtain $a_{\mu}^{\textrm{HLbL};A} = \left(0.8^{+3.5}_{-0.1}\right
Externí odkaz:
http://arxiv.org/abs/1910.02881
Autor:
Sanchez-Puertas, Pablo
In this work we investigate the possibility to observe $C\!P$-violation in $\eta$ decays containing muons at the proposed REDTOP experiment. Employing the SMEFT to parametrize the new-physics $C\!P$-violating effects, we find that a single operator e
Externí odkaz:
http://arxiv.org/abs/1909.07491