منابع مشابه
QCD in Nuclear Processes at Jefferson Lab
The scientific program at Jefferson Lab to probe the properties of QCD in the nuclear environment is outlined. The experimental facilities are described and recent results are presented including measurements of color transparency and medium modifications of vector mesons. The evidence for the onset of color transparency is modest and changes to the mass and width of the ρ meson in heavy nuclei...
متن کاملThe Gpd Experimental Program at Jefferson Lab
Recent results on the Generalized Parton Distribution (GPD) program at Jefferson Lab (JLab) will be presented. The emphasis will be in the Hall A program aiming at measuring Q−dependences of different terms of the Deeply Virtual Compton Scattering (DVCS) cross section. This is a fundamental step before one can extract GPD information from JLab DVCS data. The upcoming program in Hall A, using bo...
متن کاملThe N * Physics Program at Jefferson Lab
Recent measurements of nucleon resonance transition form factors with CLAS at Jefferson Lab are discussed. The new data confirm the assertion of the symmetric constituent quark model of the Roper as the first radial excitation of the nucleon. The data on high Q nπ production better constrain the branching ratios βNπ and βNη for the S11(1535). For the first time, the longitudinal transition ampl...
متن کاملQCD Confinement and the Hall D Project at Jefferson Lab
An understanding of the confinement mechanism in QCD requires a detailed mapping of the spectrum of hybrid mesons. Understanding confinement means understanding the role of gluons and it is in hybrid mesons that the gluonic degrees of freedom are manifest. High statistics searches for such states with π and p beams have resulted in some tantalizing signals. There is good reason to expect beams ...
متن کاملThe N Program at Jefferson Lab - Status and Prospects
pion production, and the excitation of the lowest negative parity state N− 1/2 (1535) is studied in the pη and in the Nπ channels. First results on electroproduction of pππ show intriguing resonance structure which seems difficult to explain using known baryon resonance properties. Searches for resonances in KY ∗ and in pω channels also reveal resonance-like behavior. I also briefly address a n...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2011
ISSN: 1742-6596
DOI: 10.1088/1742-6596/299/1/012007