IS THERE A SCALAR FORM-FACTOR SUPPRESSION OF THE NUCLEON SIGMA-TERM

被引：6

作者：

COON, SA ^{[1
]}

SCADRON, MD ^{[1
]}

机构：

[1] UNIV ARIZONA, DEPT PHYS, TUCSON, AZ 85721 USA

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 1992年 / 18卷 / 12期

关键词：

D O I：

10.1088/0954-3899/18/12/008

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：

It is shown that three low-energy theorems for piN scattering can be combined with the DELTA(1232) dominance of the piN background amplitudes to describe the observed low-energy piN data. The resulting analysis does not suppress the sigma-term below its measured value of sigma(N) almost-equal-to 60 MeV, nor does a recently proposed scalar form-factor t-dependence of sigma(N)(t) emerge from piN data.

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页码：1923 / 1931

页数：9

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共 35 条

[1] CONSISTENCY CONDITIONS ON STRONG INTERACTIONS IMPLIED BY A PARTIALLY CONSERVED AXIAL-VECTOR CURRENT [J].

ADLER, SL .

PHYSICAL REVIEW, 1965, 137 (4B) :1022-&

[2] DOES THE PROTON CONTAIN LARGE STRANGE QUARK COMPONENTS [J].

ANSELMINO, M ;

SCADRON, MD .

PHYSICS LETTERS B, 1989, 229 (1-2) :117-121

[3] A QCD CALCULATION OF THE PION SCALAR FORM-FACTOR (SIGMA-TERM) [J].

BORN, R ;

HURTH, T ;

SCHILCHER, K ;

WU, YL .

PHYSICS LETTERS B, 1991, 266 (3-4) :463-466

[4] NEW VALUES OF PION-NUCLEON SCATTERING LENGTHS AND F2 [J].

BUGG, DV ;

CARTER, AA ;

CARTER, JR .

PHYSICS LETTERS B, 1973, B 44 (03) :278-280

[5] BETA = 6.0 QUENCHED WILSON FERMIONS [J].

CABASINO, S .

PHYSICS LETTERS B, 1991, 258 (1-2) :195-201

[6] IS SU(2) BY SU(2) A BETTER SYMMETRY THAN SU(3) [J].

CHENG, TP ;

DASHEN, R .

PHYSICAL REVIEW LETTERS, 1971, 26 (10) :594-&

[7] WHY A LARGE SIGMA TERM DOES NOT REQUIRE A LARGE STRANGE QUARK CONTENT IN THE NUCLEON [J].

CLEMENT, G ;

SCADRON, MD ;

STERN, J .

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 1991, 17 (02) :199-203

[8] DYNAMICAL SYMMETRY-BREAKING AND THE SIGMA-MESON MASS IN QUANTUM CHROMODYNAMICS [J].

DELBOURGO, R ;

SCADRON, MD .

PHYSICAL REVIEW LETTERS, 1982, 48 (06) :379-382

[9] THE DECAY OF A LIGHT HIGGS BOSON [J].

DONOGHUE, JF ;

GASSER, J ;

LEUTWYLER, H .

NUCLEAR PHYSICS B, 1990, 343 (02) :341-368

[10] SCALAR BOSON MASSES IN DYNAMICALLY BROKEN GAUGE-THEORIES [J].

ELIAS, V ;

SCADRON, MD .

PHYSICAL REVIEW LETTERS, 1984, 53 (12) :1129-1132

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