Exclusive Processes in Quantum Chromodynamics: The Form Factors of Baryons at Large Momentum Transfer | Zendy

G. Peter Lepage | Zendy; Stanley J. Brodsky | Zendy

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Exclusive Processes in Quantum Chromodynamics: The Form Factors of Baryons at Large Momentum Transfer

Author(s) -

G. Peter Lepage,

Stanley J. Brodsky

Publication year - 1979

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.43.545

Subject(s) - physics , quantum chromodynamics , baryon , particle physics , helicity , momentum transfer , order (exchange) , quantum number , scattering , quantum mechanics , finance , economics

The form factors of baryons at large momentum transfer are computed in quantum chromodynamics (QCD) to leading order in ..cap alpha../sub s/(Q/sup 2/) and m/sup 2//Q/sup 2/. Asymptotically, we predict Q/sup 4/G/sub M/ /sup p/(Q/sup 2/) ..-->.. C(..cap alpha../sub s/(Q/sup 2/))/sup 2+4/3beta/ and G/sub M/ /sup n//G/sub M/ /sup p/ ..-->.. -2/3, where ..beta.. = 11 - (2/3) n/sub flavor/ and C > 0. Form factors for processes in which the baryon helicity is changed or in which the initial or final baryon has helicity greater than 1 are suppressed by factors of m/Q. We also give QCD predictions for general exclusive scattering processes at large momentum transfer.

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