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190 papers · 1 filter
Deconstructing HD 28867
Frederick M. Walter, Tracy L. Beck, Jon A. Morse +1
The 3" pair of B9 stars, HD 28867, is one of the brightest X-ray sources in the Taurus-Auriga star forming region. In this multi-wavelength study, we attempt to deduce the source o…
Two-loop QCD corrections for 2 to 2 parton scattering processes
Maria Elena Tejeda-Yeomans
A summary is presented of the most recent matrix elements for massless 2 to 2 scattering processes calculated at two loops in QCD perturbation theory together with a brief review o…
Instanton contribution to scalar charmonium and glueball decays
Valeriu Zetocha, Thomas Schaefer
We study instanton contributions to hadronic decays of the scalar glueball, the pseudoscalar charmonium state , and the scalar charmonium state . Hadronic decays of the $…
Indications of Neutrino Oscillation in a 250 km Long-baseline Experiment
K2K Collaboration, M. H. Ahn
The K2K experiment observes indications of neutrino oscillation: a reduction of flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are obs…
Hard Exclusive Baryon-Antibaryon Production in Two-Photon Collisions
Carola F. Berger, Wolfgang Schweiger
We study baryon pair production in two-photon collisions, gamma gamma -> B Bbar, within perturbative quantum chromodynamics, treating baryons as quark-diquark systems. We extend pr…
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…