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pro vyhledávání: '"Artru, Xavier"'
The recently developed quantum mechanical string+${}^3P_0$ model of polarized quark fragmentation with pseudoscalar and vector meson production has been implemented in a stand alone Monte Carlo program. The simulation enables the detailed study of th
Externí odkaz:
http://arxiv.org/abs/2201.05792
Autor:
Artru, Xavier, Kerbizi, Albi
We present the main theoretical aspects of the quantum mechanical string+${}^3P_0$ model of polarized quark fragmentation for pseudoscalar and vector meson production. The model is an extension of the Lund string fragmentation model that systematical
Externí odkaz:
http://arxiv.org/abs/2201.05509
Autor:
Artru, Xavier
Particles traveling in aligned crystals at small angles w.r.t. crystallographic axes or planes are principally steered by the continuous Lindhard potential. This interaction conserves the energy E, the longitudinal momentum p_parallel, the transverse
Externí odkaz:
http://arxiv.org/abs/2003.03818
Autor:
Artru, Xavier
Two properties of the radiation emitted by a relativistic electron in an external field, in the classical approximation, are presented in details: 1) spectral sum rules and their relationship with the sum rules for oscillator strength in atomic physi
Externí odkaz:
http://arxiv.org/abs/2003.03820
Autor:
Artru, Xavier
Phenomenological aspects of radiation by relativistic electrons in external field, in matter or the vicinity of matter are reviewed, among which: infrared divergence, coherence length effects, shadowing, enhancement in aligned crystals, quantum recoi
Externí odkaz:
http://arxiv.org/abs/1412.2061
Autor:
Artru, Xavier, Redouane-Salah, Essma
Publikováno v:
Phys. Rev. A 93, 023403 (2016)
The tunneling ionization of a hydrogen atom excited in the presence of a static electric field is investigated for the case where, before being extracted, the electron has an orbital angular momentum L perpendicular to the field E. The escaping elect
Externí odkaz:
http://arxiv.org/abs/1409.6574
We discuss model-independent constraints on spin observables in exclusive and inclusive reactions, with special attention to the case of photoproduction.
Comment: 6 pages, 5 figures, Talk by J.-M. Richard at NSTAR 2009, IHEP, Beijing (China), Ap
Comment: 6 pages, 5 figures, Talk by J.-M. Richard at NSTAR 2009, IHEP, Beijing (China), Ap
Externí odkaz:
http://arxiv.org/abs/0907.3890
Positivity constrains the allowed domain for sets of spin observables in exclusive or inclusive reactions. Examples are given for strangeness-echange reactions and photoproduction.
Comment: 4 pages, to appear in the Proc. QCD08, MOntpellier, Fra
Comment: 4 pages, to appear in the Proc. QCD08, MOntpellier, Fra
Externí odkaz:
http://arxiv.org/abs/0810.1805
Publikováno v:
Physics Reports 470 (2009) 1-92
Model-independent identities and inequalities relating the various spin observables of a reaction are reviewed in a unified formalism, together with their implications for dynamical models, their physical interpretation, and the quantum aspects of th
Externí odkaz:
http://arxiv.org/abs/0802.0164
Publikováno v:
Phys.Rev.C75:024002,2007
Positivity constraints have proved to be important for spin observables of exclusive reactions involving polarized initial and final particles. Attention is focused in this note on the photoproduction of pseudoscalar mesons from spin 1/2 baryons, mor
Externí odkaz:
http://arxiv.org/abs/nucl-th/0606050