Results 31 to 40 of about 26,568 (152)

A tmQCD mixed-action approach to flavour physics

EPJ Web of Conferences, 2018
We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks.
Herdoíza Gregorio, Pena Carlos, Preti David, Romero José Ángel, Ugarrio Javier   +4 more
doaj   +1 more source

Electromagnetic Transition Form Factors of Mesons

, 2011
Using a counting scheme which treats pseudoscalar and vector mesons on equal footing, the decays of the narrow light vector mesons omega and phi into a dilepton and a pseudoscalar pi-meson or eta-meson, respectively, are calculated. Thereby, all required
Achasov, Arnaldi, C. Terschlüsen, Gasser, Leupold, Lutz, Nakamura, S. Leupold, Sakurai, Scherer, Terschlüsen   +10 more
core   +1 more source

Mass Spectrum of Noncharmed and Charmed Meson States in Extended Linear-Sigma Model

Particles
The mass spectrum of different meson particles is generated using an effective Lagrangian of the extended linear-sigma model (eLSM) for scalar and pseudoscalar meson fields and quark flavors, up, down, strange, and charm.
Azar I. Ahmadov, Azzah A. Alshehri, Abdel Nasser Tawfik   +2 more
doaj   +1 more source

Model discrimination in pseudoscalar-meson photoproduction

Physics Letters B, 2016
To learn about a physical system of interest, experimental results must be able to discriminate among models. We introduce a geometrical measure to quantify the distance between models for pseudoscalar-meson photoproduction in amplitude space ...
J. Nys, J. Ryckebusch, D.G. Ireland, D.I. Glazier   +3 more
doaj   +1 more source

Meson Masses and Mixing Angles in 2+1 Flavor Polyakov Quark Meson Sigma Model and Symmetry Restoration Effects

, 2010
The meson masses and mixing angles have been calculated for the scalar and pseudoscalar sector in the framework of the generalized 2+1 flavor Polyakov loop augmented quark meson linear sigma model. We have given the results for two different forms of the
J. I. Kapusta, Uma Shankar Gupta, Vivek Kumar Tiwari   +2 more
core   +1 more source

Meson electromagnetic form factors

EPJ Web of Conferences, 2012
The electromagnetic structure of the pseudoscalar meson nonet is completely described by the sophisticated Unitary&Analytic model, respecting all known theoretical properties of the corresponding form factors.
Dubničková Anna Z., Dubnička Stanislav   +1 more
doaj   +1 more source

Role of vector and pseudoscalar mesons in understanding $1/2^-$ $N^*$ and $\Delta$ resonances

, 2013
A study of nonstrange meson-baryon systems has been made with the idea of understanding the properties of the low-lying $1/2^-$ $N^*$ and $\Delta$ resonances.
Hosaka, A., Khemchandani, K. P., Nagahiro, H., Torres, A. Martínez   +3 more
core   +1 more source

Gamma-gamma physics and meson transition form factors [PDF]

EPJ Web of Conferences, 2020
I summarize recent experimental results for two photon production of mesons. These processes include the neutral pion, η and η′ transition form factors and two photon production of pseudoscalar meson pairs.
Kupsc Andrzej
doaj   +1 more source

Probing the transversity spin structure of a nucleon in neutrino-production of a charmed meson

EPJ Web of Conferences, 2016
Including O(mc) terms in the coefficient functions and/or O(mD) twist 3 contributions in the heavy meson distribution amplitudes leads to a non-zero transverse amplitude for exclusive neutrino production of a D pseudoscalar charmed meson on an ...
Pire B., Szymanowski L., Wagner J.
doaj   +1 more source

Relative phases in Dalitz plot amplitudes for $D^0 \to K_S \pi^+ \pi^-$ and $D^0 \to \pi^0 K^+ K^-$ [PDF]

, 2010
Relative phases of amplitudes for $D$ meson decays to a light pseudoscalar meson $P$ and a light vector meson $V$ decaying to two pseudoscalar mesons will lead to characteristic interferences on the three-body Dalitz plot.
Bhubanjyoti Bhattacharya, E. Blucher, Jonathan L. Rosner   +2 more
core   +1 more source