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Titolo:
NN CORE INTERACTIONS AND DIFFERENTIAL CROSS-SECTIONS FROM ONE GLUON EXCHANGE
Autore:
BARNES T; CAPSTICK S; KOVARIK MD; SWANSON ES;
Indirizzi:
OAK RIDGE NATL LAB,DIV PHYS OAK RIDGE TN 37831 OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS OAK RIDGE TN 37831 UNIV TENNESSEE,DEPT PHYS KNOXVILLE TN 37996 CONTINUOUS ELECTRON BEAM ACCELERATOR FACIL NEWPORT NEWS VA 23606 OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS OAK RIDGE TN 37831 OAK RIDGE NATL LAB,DIV PHYS OAK RIDGE TN 37831 MIT,CTR HYG & MICROBIOL CAMBRIDGE MA 02139 MIT,NUCL SCI LAB,CTR THEORET PHYS CAMBRIDGE MA 02139
Titolo Testata:
Physical review. C. Nuclear physics
fascicolo: 2, volume: 48, anno: 1993,
pagine: 539 - 552
SICI:
0556-2813(1993)48:2<539:NCIADC>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEON-NUCLEON-INTERACTION; RELATIVIZED QUARK-MODEL; PERTURBATIVE QUANTUM CHROMODYNAMICS; LARGE-MOMENTUM-TRANSFER; MESON-MESON SCATTERING; SHORT-RANGE PART; ELASTIC-SCATTERING; DIBARYON RESONANCES; EXCLUSIVE PROCESSES; POTENTIAL MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
85
Recensione:
Indirizzi per estratti:
Citazione:
T. Barnes et al., "NN CORE INTERACTIONS AND DIFFERENTIAL CROSS-SECTIONS FROM ONE GLUON EXCHANGE", Physical review. C. Nuclear physics, 48(2), 1993, pp. 539-552

Abstract

We derive nonstrange baryon-baryon scattering amplitudes in the nonrelativistic quark model using the ''quark Born diagram'' formalism. This approach describes the scattering as a single interaction, here the one-gluon-exchange (OGE) spin-spin term followed by constituent interchange, with external nonrelativistic baryon wave functions attached tothe scattering diagrams to incorporate higher-twist wave-function effects. The short-range repulsive core in the NN interaction has previously been attributed to this spin-spin interaction in the literature; we find that these perturbative constituent-interchange diagrams do indeed predict repulsive interactions in all I, S channels of the nucleon-nucleon system, and we compare our results for the equivalent short-range potentials to the core potentials found by other authors using nonperturbative methods. We also apply our perturbative techniques to the NDELTA and DELTADELTA systems: Some DELTADELTA channels are found tohave attractive core potentials and may accommodate ''molecular'' bound states near threshold. Finally we use our Born formalism to calculate the NN differential cross section, which we compare with experimental results for unpolarized proton-proton elastic scattering. We find that several familiar features of the experimental differential cross section are reproduced by our Born-order result.

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Documento generato il 07/07/20 alle ore 12:46:39