Pregled bibliografske jedinice broj: 379955
Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules
Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules // Physical review. D, Particles, fields, gravitation, and cosmology, 78 (2008), 3; 033009, 36 doi:10.1103/PhysRevD.78.033009 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 379955 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules
Autori
Passek-Kumerički, Kornelija ; Peters, Gerhard
Izvornik
Physical review. D, Particles, fields, gravitation, and cosmology (1550-7998) 78
(2008), 3;
033009, 36
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
nucleon form factors ; light-cone sum rules ; next-to-leading order corrections
Sažetak
We have calculated the leading-twist next-to-leading order (NLO), i.e., O(alpha_s), correction to the light-cone sum rules prediction for the electromagnetic form factors of the nucleon. We have used the Ioffe nucleon interpolation current and worked in M_N=0 approximation, with M_N being the mass of the nucleon. In this approximation, only the Pauli form factor F_2 receives a correction and the calculated correction is quite sizable (cca 60%). The numerical results for the proton form factors show the improved agreement with the experimental data. We also discuss the problems encountered when going away from M_N=0 approximation at NLO, as well as, gauge invariance of the perturbative results. This work presents the first step towards the NLO accuracy in the light-cone sum rules for baryon form factors.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
098-0982930-2864 - Fundamentalne interakcije u fizici elementarnih čestica i kozmologiji (Duplančić, Goran, MZOS ) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb
Profili:
Kornelija Passek-Kumerički
(autor)
