10,640 research outputs found
Electromagnetic Form Factors and the Hypercentral CQM
New results about the electromagnetic form factors of the nucleon are
obtained with a semirelativistic version of the hypercentral constituent quark
model (hCQM) and a relativistic current. The complex structure of the
constituent quarks is taken into account implicitly by means of
phenomenological constituent quark form factors. We obtain a detailed
reproduction of the experimental data up to , moreover our findings
about constituent quark root mean square radii are of the same order than the
recent ones obtained analyzing the proton structure functions.Comment: 11 pages, 4 figure
Top quark charge asymmetry measurements with ATLAS detector
The top quark charge asymmetry measurements performed with ATLAS detector at
a centre-of-mass energy of 7 TeV are presented.Comment: 5 pages text + 1 title page , 4 figures Proceedings of the 8th
International Workshop on the CKM Unitarity Triangle (CKM 2014), Vienna,
Austria, September 8-12, 201
Random Multi-Overlap Structures for Optimization problems
We extend to the random K-SAT and p-XOR-SAT optimization problems the results
obtained for the Viana-Bray model of diluted mean field spin glass.Comment: 9 page
Covariant Hamiltonian Dynamics with Negative Energy States
A relativistic quantum mechanics is studied for bound hadronic systems in the
framework of the Point Form Relativistic Hamiltonian Dynamics. Negative energy
states are introduced taking into account the restrictions imposed by a correct
definition of the Poincar\'e group generators. We obtain nonpathological,
manifestly covariant wave equations that dynamically contain the contributions
of the negative energy states. Auxiliary negative energy states are also
introduced, specially for studying the interactions of the hadronic systems
with external probes.Comment: 42 pages, submitted to EPJ
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