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pro vyhledávání: '"Drechsel, D."'
Autor:
Drechsel, D.
Transcription factors (TFs) of the basic helix-loop-helix (bHLH) family, so called 'proneural proteins', are key regulators of neuron generation in mammals. During embryonic development, Ascl1/Mash1 and Neurogenin2, the two main proneural factors in
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.565828
Recent progress on the extraction of electromagnetic properties of nucleon resonance excitation through pion photo- and electroproduction is reviewed. Cross section data measured at MAMI, ELSA, and CEBAF are analyzed and compared to the analysis of o
Externí odkaz:
http://arxiv.org/abs/1109.6745
Publikováno v:
Eur.Phys.J.ST 198 (2011) 269-285
We review recent developments in the theoretical investigation of the nucleon polarizabilities. We first report on the static polarizabilities as measured in real Compton scattering, comparing and interpreting the results from various theoretical app
Externí odkaz:
http://arxiv.org/abs/1105.4454
Publikováno v:
Phys.Rev.C82:055203,2010
Within the previously developed Dubna-Mainz-Taipei meson-exchange model, the singularity structure of the pi N scattering amplitudes has been investigated. For all partial waves up to F waves and c.m. energies up to W = 2 GeV, the T-matrix poles have
Externí odkaz:
http://arxiv.org/abs/1007.2126
Publikováno v:
Phys.Lett.B687:160-166,2010
As a guideline for future experiments to extract the four (leading) spin polarizabilities of the nucleon, we have constructed the forward amplitude for polarized Compton scattering by dispersion integrals. These integrals have been saturated by recen
Externí odkaz:
http://arxiv.org/abs/1001.4230
Autor:
Drechsel, D.
Publikováno v:
AIP Conf.Proc.1155:3-17,2009
The Gerasimov-Drell-Hearn sum rule and related dispersive integrals connect real and virtual Compton scattering to inclusive photo- and electroproduction. Being based on universal principles as causality, unitarity, and gauge invariance, these relati
Externí odkaz:
http://arxiv.org/abs/0910.0719
The unitary isobar model MAID2007 has been used to analyze the recent data of pion electroproduction. The model contains all four-star resonances in the region below W=2 GeV and both single-Q^2 and Q^2 dependent transition form factors could be obtai
Externí odkaz:
http://arxiv.org/abs/0909.2335
Publikováno v:
PoS CD09:037,2009
Recent attempts to determine the pion polarizability by dispersion relations yield values that disagree with the predictions of chiral perturbation theory. These dispersion relations are based on specific forms for the absorptive part of the Compton
Externí odkaz:
http://arxiv.org/abs/0908.4260
Publikováno v:
Phys.Rev.C81:029802,2010
We reply to the Comment by Fil'kov and Kashevarov, arXiv:0805.4486 [hep-ph]. We show that the discrepancies between ChPT and dispersion theory, reported for the polarizability of the pion, result from applying dispersion theory to non-analytic functi
Externí odkaz:
http://arxiv.org/abs/0908.4291
The polarizability of the pion: no conflict between dispersion theory and chiral perturbation theory
Publikováno v:
Phys.Rev.C77:065211,2008
Recent attempts to determine the pion polarizability by dispersion relations yield values that disagree with the predictions of chiral perturbation theory. These dispersion relations are based on specific forms for the absorptive part of the Compton
Externí odkaz:
http://arxiv.org/abs/0805.0213