Scale Breaking and Anomalies in Deep Inelastic Lepton Scattering

A number of striking features in high-energy lepton scattering have forced a re-examination of the standard four-quark-parton models: Recent data show (i) at small x in ..mu..N ..-->.. ..mu..X, ..nu..W/sub 2/ increases as Q/sup 2/ increases; for increasing E in ..nu..N ..-->.. ..mu..X, there a...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1977-01, Vol.38 (22), p.1244-1247
Hauptverfasser:	Shaw, Gordon L., Faroughy, Dara, Thomas, Paul
Format:	Artikel
Sprache:	eng
Schlagworte:	645203 - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties COMPOSITE MODELS CROSS SECTIONS DEEP INELASTIC SCATTERING DISTRIBUTION FUNCTIONS ENERGY DEPENDENCE ENERGY RANGE FUNCTIONS GEV RANGE INELASTIC SCATTERING INTERACTIONS INVARIANCE PRINCIPLES LEPTON-BARYON INTERACTIONS LEPTON-HADRON INTERACTIONS LEPTON-NUCLEON INTERACTIONS MATHEMATICAL MODELS MUON-NUCLEON INTERACTIONS NEUTRINO-NUCLEON INTERACTIONS PARTICLE INTERACTIONS PARTICLE MODELS PARTON MODEL PHYSICS OF ELEMENTARY PARTICLES AND FIELDS QUARK MODEL SCALE INVARIANCE SCATTERING STRUCTURE FUNCTIONS
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Zusammenfassung:	A number of striking features in high-energy lepton scattering have forced a re-examination of the standard four-quark-parton models: Recent data show (i) at small x in ..mu..N ..-->.. ..mu..X, ..nu..W/sub 2/ increases as Q/sup 2/ increases; for increasing E in ..nu..N ..-->.. ..mu..X, there are rises in (ii) /sup nu-bar/ nd (iii) sigma/sup nu-bar//sigma/sup ..nu../. We introduce a W dependence to the sea-quark distributions (motivated by the possible existence of multiquark exotic states) and obtain satisfactory fits to the data (i) - (iii).
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.38.1244