MOMENTUM DEPENDENCE OF THE RHO-OMEGA-MIXING AMPLITUDE IN A HADRONIC MODEL

被引：63

作者：

PIEKAREWICZ, J ^{[1
]}

WILLIAMS, AG ^{[1
]}

机构：

[1] FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA

来源：

PHYSICAL REVIEW C | 1993年 / 47卷 / 06期

关键词：

D O I：

10.1103/PhysRevC.47.R2462

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We calculate the momentum dependence of the rho-omega mixing amplitude in a purely hadronic model. The basic assumption of the model is that the mixing amplitude is generated by NNBAR loops and thus driven entirely by the neutron-proton mass difference. The value of the amplitude at the omega-meson point is expressed in terms of only the NNomega and NNrho coupling constants. Using values for these couplings constrained by empirical two-nucleon data we obtain a value for the mixing amplitude in agreement with experiment. Extending these results to the spacelike region, we find a rho-omega contribution to the NN interaction that is strongly suppressed and opposite in sign relative to the conventional contribution obtained from using the constant on-shell value for the mixing amplitude.

引用

页码：R2462 / R2466

页数：5

共 29 条

[1] CHARGE-SYMMETRY BREAKING IN NP ELASTIC-SCATTERING AT 477 MEV [J].

ABEGG, R ;

BANDYOPADHYAY, D ;

BIRCHALL, J ;

CAIRNS, EB ;

COOMBES, GH ;

DAVIS, CA ;

DAVISON, NE ;

DELHEIJ, PPJ ;

GREEN, PW ;

GREENIAUS, LG ;

GUBLER, HP ;

HEALEY, DC ;

LAPOINTE, C ;

LEE, WP ;

MCDONALD, WJ ;

MILLER, CA ;

MOSS, GA ;

PLATTNER, GR ;

POFFENBERGER, PR ;

RAMSAY, WD ;

ROY, G ;

SOUKUP, J ;

SVENNE, JP ;

TKACHUK, RR ;

VANOERS, WTH ;

WAIT, GD ;

ZHANG, YP .

PHYSICAL REVIEW D, 1989, 39 (09) :2464-2483

[2] TEST OF CHARGE SYMMETRY IN NEUTRON-PROTON ELASTIC-SCATTERING AT 477 MEV [J].

ABEGG, R ;

BANDYOPADHYAY, D ;

BIRCHALL, J ;

CAIRNS, EW ;

COOMBES, H ;

DAVIS, CA ;

DAVISON, NE ;

DELHEIJ, PPJ ;

GREEN, PW ;

GREENIAUS, LG ;

GUBLER, HP ;

HEALEY, DC ;

LAPOINTE, C ;

LEE, WP ;

MCDONALD, WJ ;

MILLER, CA ;

MOSS, GA ;

PLATTNER, GR ;

POFFENBERGER, PR ;

RAMSAY, WD ;

ROY, G ;

SOUKUP, J ;

SVENNE, JP ;

TKACHUK, R ;

VANOERS, WTH ;

WAIT, GD ;

ZHANG, YP .

PHYSICAL REVIEW LETTERS, 1986, 56 (24) :2571-2574

[3] VERTEX CORRECTIONS TO VACUUM POLARIZATION IN HADRONIC FIELD-THEORIES [J].

ALLENDES, MP ;

SEROT, BD .

PHYSICAL REVIEW C, 1992, 45 (06) :2975-2988

[4] ELECTROMAGNETIC PION FORM-FACTOR IN THE TIMELIKE REGION [J].

BARKOV, LM ;

CHILINGAROV, AG ;

EIDELMAN, SI ;

KHAZIN, BI ;

LELCHUK, MY ;

OKHAPKIN, VS ;

PAKHTUSOVA, EV ;

REDIN, SI ;

RYSKULOV, NM ;

SHATUNOV, YM ;

SHEKHTMAN, AI ;

SHWARTZ, BA ;

SIDOROV, VA ;

SKRINSKY, AN ;

SMAKHTIN, VP ;

SOLODOV, EP .

NUCLEAR PHYSICS B, 1985, 256 (03) :365-384

[5] CONTRIBUTION OF CHARGE SYMMETRY-BREAKING FORCES TO ENERGY DIFFERENCES IN MIRROR NUCLEI [J].

BLUNDEN, PG ;

IQBAL, MJ .

PHYSICS LETTERS B, 1987, 198 (01) :14-18

[6] SIGN OF RHO-OMEGA MIXING CHARGE ASYMMETRIC NN POTENTIAL [J].

COON, SA ;

SCADRON, MD ;

MCNAMEE, PC .

NUCLEAR PHYSICS A, 1977, 287 (03) :381-389

[7] RHO-OMEGA MIXING IN NUCLEAR-CHARGE ASYMMETRY [J].

COON, SA ;

BARRETT, RC .

PHYSICAL REVIEW C, 1987, 36 (06) :2189-2194

[8] RELATIVISTIC SPECTRAL RANDOM-PHASE APPROXIMATION IN FINITE NUCLEI [J].

DAWSON, JF ;

FURNSTAHL, RJ .

PHYSICAL REVIEW C, 1990, 42 (05) :2009-2022

[9] A NEW PERSPECTIVE ON THE RHO-OMEGA CONTRIBUTION TO CHARGE-SYMMETRY VIOLATION IN THE NUCLEON-NUCLEON FORCE [J].

GOLDMAN, T ;

HENDERSON, JA ;

THOMAS, AW .

FEW-BODY SYSTEMS, 1992, 12 (2-4) :123-132

[10]

GOLDMAN T, IN PRESS MOD PHYS A

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