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32 papers · 2 filters
Perturbative fragmentation
B. Z. Kopeliovich, H. -J. Pirner, I. K. Potashnikova +2
The Berger model of perturbative fragmentation of quarks to pions is improved by providing an absolute normalization and keeping all terms in a (1-z) expansion, which makes the cal…
Measurement of the Proton Asymmetry Parameter C in Neutron Beta Decay
M. Schumann, M. Kreuz, M. Deissenroth +7
The proton asymmetry parameter C in neutron decay describes the correlation between neutron spin and proton momentum. In this Letter, the first measurement of this quantity is pres…
Patterns of Gauge Mediation in Metastable SUSY Breaking
Steven A. Abel, Callum Durnford, Joerg Jaeckel +1
Supersymmetry breaking in a metastable vacuum allows one to build simple and concrete models of gauge mediation. Generation of gaugino masses requires that R-symmetry be broken in…
Laser experiments explore the hidden sector
M. Ahlers, H. Gies, J. Jaeckel +2
Recently, the laser experiments BMV and GammeV, searching for light shining through walls, have published data and calculated new limits on the allowed masses and couplings for axi…
Azimuthal anisotropy of direct photons
B. Z. Kopeliovich, H. J. Pirner, A. H. Rezaeian +1
The electromagnetic bremsstrahlung produced by a quark interacting with nucleons or nuclei is azimuthally asymmetric. In the light-cone dipole approach this effect is related to th…
Holographic glueball structure
Hilmar Forkel
We derive and systematically analyze scalar glueball correlation functions in both the hard-wall and dilaton soft-wall approximations to holographic QCD. The dynamical content of t…