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DOE OSTI Β· 21608441

Proposal for GPD studies at COMPASS

Burtin, E
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Abstract

The study of nucleon structure through Generalised Parton Distributions (GPD) is one major part of the future COMPASS-II physics program and can be performed using exclusive reactions like Deeply Virtual Compton Scattering (DVCS) and Meson Production. The high energy of the muon beam allows to measure the x{sub B}-dependence of the t-slope of the DVCS cross section. The use of positive and negative polarised muon beams allows to determine the Beam Charge and Spin Difference of the DVCS cross sections to access the real part of the Compton form factor related to the dominant GPD H. The sensitivity of both measurements is examined and confronted to existing models or global fits of the data. Preliminary beam test data were analyzed and demonstrated the feasibility of the identification of the DVCS reaction using the COMPASS experimental set-up.

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS73 NUCLEAR PHYSICS AND RADIATION PHYSICSANGULAR MOMENTUMBARYONSBASIC INTERACTIONSBEAMSBOSONSCOMPTON EFFECTCROSS SECTIONSDIMENSIONLESS NUMBERSDISTRIBUTION FUNCTIONSELASTIC SCATTERINGELECTROMAGNETIC INTERACTIONSELEMENTARY PARTICLESEXCLUSIVE INTERACTIONSFERMIONSFORM FACTORSFUNCTIONSGLUONSHADRONSINTERACTIONSLEPTON BEAMSLEPTONSMEASURING INSTRUMENTSMULTIPARTICLE SPECTROMETERSMUON BEAMSMUONSNUCLEONSPARTICLE BEAMSPARTICLE IDENTIFICATIONPARTICLE INTERACTIONSPARTICLE KINEMATICSPARTICLE PRODUCTIONPARTICLE PROPERTIESQUARKSSCATTERINGSPECTROMETERSSPIN

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Burtin, E. 2011-10-24. Proposal for GPD studies at COMPASS. https://doi.org/10.1063/1.3647097

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