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122 papers · 1 filter
Generating Lie and gauge free differential (super)algebras by expanding Maurer-Cartan forms and Chern-Simons supergravity
Jose A. de Azcarraga, Jose M. Izquierdo, Moises Picon +1
We study how to generate new Lie algebras from a given one . The (order by order) method consists in expanding its Maurer-Cartan on…
Universal extra dimensions and Z->b bar-b
J. F. Oliver, J. Papavassiliou, A. Santamaria
We study, at the one loop level, the dominant contributions from a single universal extra dimension to the process (Z\to b\bar{b}). By resorting to the gaugeless limit of the theor…
On the classification of type D spacetimes
J. J. Ferrando, J. A. Sáez
We give a classification of the type D spacetimes based on the invariant differential properties of the Weyl principal structure. Our classification is established using tensorial…
QCD Effective Actions at High Temperature and the Quasiparticle Picture
Cristina Manuel
Transport theory is an efficient approach to derive an effective theory for the soft modes of QCD at high temperature. It is known that the leading order operators of this theory c…
Determination of m_s and |V_us| from hadronic tau decays
E. Gamiz, M. Jamin, A. Pich +2
The mass of the strange quark is determined from SU(3)-breaking effects in the tau hadronic width. Compared to previous analyses, the contributions from scalar and pseudoscalar spe…
Does the Sun Shine by pp or CNO Fusion Reactions?
John N. Bahcall, M. C. Gonzalez-Garcia, C. Penya-Garay
We show that solar neutrino experiments set an upper limit of 7.8% (7.3% including the recent KamLAND measurements) to the fraction of energy that the Sun produces via the CNO fusi…