pi- p ---> pi0 pi0 n near threshold and chiral symmetry breaking - INSPIRE

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pi- p ---> pi0 pi0 n near threshold and chiral symmetry breaking

1991

10 pages

Published in:

Phys.Rev.C 44 (1991) 956-965

DOI:

10.1103/PhysRevC.44.956

Experiments:

BNL-E-0857

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Abstract: (APS)

Total cross sections, angular, and mass distributions for the reaction π−p→π0π0n have been measured for pπ−(lab)=7–140 MeV/c above threshold. The threshold amplitude was used to determine a value for the chiral-symmetry-breaking parameter, ξ, of -0.98±0.52. The ππ scattering lengths aI for isospin I=0 and 2 are derived from this result, together with a current-algebra sum rule. The results are a0=(0.207±0.028)mπ−1 and a2=(-0.022±0.011)mπ−1. These values are consistent with chiral symmetry broken by the Weinberg ππ interaction and the effects of the f0(975) scalar meson.

pi- p: charge exchange
charge exchange: pi- p
pi0: pair production
pair production: pi0
symmetry breaking: chiral
channel cross section: momentum dependence
angular distribution
mass spectrum: (2pi0)
(2pi0): mass spectrum
mass mass spectrum: missing-mass

References(28)

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Pion scattering lengths

Steven Weinberg
(
- UC, Berkeley
)

- Phys.Rev.Lett. 17 (1966) 616-621
•
DOI:
- 10.1103/PhysRevLett.17.616

Precise relations between the spectra of vector and axial vector mesons

Steven Weinberg
(
- UC, Berkeley
)

- Phys.Rev.Lett. 18 (1967) 507-509
•
DOI:
- 10.1103/PhysRevLett.18.507

Nonlinear realizations of chiral symmetry

Steven Weinberg
(
- MIT, LNS
)

- Phys.Rev. 166 (1968) 1568-1577
•
DOI:
- 10.1103/PhysRev.166.1568

Chiral dynamics

Julian S. Schwinger
(
- Harvard U.
)

- Phys.Lett.B 24 (1967) 473-476
•
DOI:
- 10.1016/0370-2693(67)90277-8

Use of Single-Pion Production to Remove Ambiguities in Partially Conserved Axial-Vector Current and Current-Algebra Predictions of pi-pi Scattering

- Phys.Rev.Lett. 20 (1968) 1127-1130
•
DOI:
- 10.1103/PhysRevLett.20.1127

Consistence of low-energy parameters and soft-pion scattering theory

M.G. Olsson
(
- Wisconsin U., Madison
)
,
L. Turner
(
- Wisconsin U., Madison
)

- Phys.Rev. 181 (1969) 2141-2142
•
DOI:
- 10.1103/PhysRev.181.2141

General chiral-symmetry breaking and sigma terms

L. Turner
(
- Wisconsin U., Madison
)
,
M.G. Olsson
(
- Wisconsin U., Madison
)

- Phys.Rev.D 6 (1972) 3522-3526
•
DOI:
- 10.1103/PhysRevD.6.3522

Departures from Chiral Symmetry: A Review

Heinz Pagels
(
- Rockefeller U.
)

- Phys.Rept. 16 (1975) 219
•
DOI:
- 10.1016/0370-1573(75)90039-3

Current Algebra, PCAC and the Quark Model

M.D. Scadron
(
- Arizona U.
)

- Rept.Prog.Phys. 44 (1981) 213-292,
- Rep. Prog. Phys. 44 ( 1981) 213-292
•
DOI:
- 10.1088/0034-4885/44/3/001

Hadron Masses and Sigma Commutator in the Light of Chiral Perturbation Theory

J. Gasser
(
- Bern U.
)

- Annals Phys. 136 (1981) 62
•
DOI:
- 10.1016/0003-4916(81)90086-5

Chiral Perturbation Theory to One Loop

J. Gasser
(
- Bern U.
)
,
H. Leutwyler
(
- CERN
)

- Annals Phys. 158 (1984) 142
•
DOI:
- 10.1016/0003-4916(84)90242-2

Isospin Analysis of Low-energy $\pi N \to \pi \pi N$ Data and Chiral Symmetry Breaking

D.M. Manley
(
- Virginia Tech.
)

- Phys.Rev.D 30 (1984) 536-540
•
DOI:
- 10.1103/PhysRevD.30.536

Cross-section Measurement of $\pi^- p \to \pi^- \pi^+ n$ Reaction Near Threshold

OMICRON

Collaboration

•

G. Kernel
(
- Stefan Inst., Ljubljana and
- Ljubljana U.
)

et al.

- Phys.Lett.B 216 (1989) 244-248
•
DOI:
- 10.1016/0370-2693(89)91403-2

Measurement of $\pi^- p \to \pi^- p \pi^0$ Reaction Near Threshold and Breaking of Chiral Symmetry

OMICRON

Collaboration

•

G. Kernel
(
- Stefan Inst., Ljubljana and
- Ljubljana U.
)

et al.

- Phys.Lett.B 225 (1989) 198-202
•
DOI:
- 10.1016/0370-2693(89)91036-8

Measurement of the reaction pi+ p ---> pi+ pi+ n near threshold

OMICRON

Collaboration

•

G. Kernel
(
- Stefan Inst., Ljubljana and
- Ljubljana U.
)

et al.

- Z.Phys.C 48 (1990) 201-208,
- In *Peking 1987, Proceedings, Medium energy physics* 604-605.
•
DOI:
- 10.1007/BF01554466

Kinematically complete measurement of the reaction pi- p ---> pi+ pi- n in the region of Delta dominance as a test of chiral Lagrangians

H.W. Ortner
(
- Erlangen - Nuremberg U. and
- Karlsruhe U., EKP and
- Karlsruhe U.
)
,
R. Baran
(
- Erlangen - Nuremberg U. and
- Karlsruhe U., EKP and
- Karlsruhe U.
)
,
U. Bohnert
(
- Erlangen - Nuremberg U. and
- Karlsruhe U., EKP and
- Karlsruhe U.
)
,
M. Dillig
(
- Erlangen - Nuremberg U. and
- Karlsruhe U., EKP and
- Karlsruhe U.
)
,
G. Herrmann
(
- Erlangen - Nuremberg U. and
- Karlsruhe U., EKP and
- Karlsruhe U.
)

et al.

- Phys.Rev.Lett. 64 (1990) 2759-2762
•
DOI:
- 10.1103/PhysRevLett.64.2759

Measurement of the H (pi+, pi+ pi+) n cross-section very near threshold and chiral symmetry

et al.

- Phys.Rev.Lett. 66 (1991) 2569-2572
•
DOI:
- 10.1103/PhysRevLett.66.2569

Design and Performance of Modularized Nai(tl) Detectors With Rectangular Crystal Elements: An Array of 49 and the Crystal Box

et al.

- Nucl.Instrum.Meth.A 264 (1988) 263-284
•
DOI:
- 10.1016/0168-9002(88)90915-1

PION - NUCLEON PARTIAL WAVE ANALYSIS TO 1100-MeV

- Phys.Rev.D 32 (1985) 1085
•
DOI:
- 10.1103/PhysRevD.32.1085

SEARCH FOR STRUCTURE IN THE LOW-ENERGY ANTI-p p p ANNIHILATION CROSS-SECTION

et al.

- Phys.Rev.D 23 (1981) 2784,
- In *Bressanone 1980, Proceedings, Nucleon Anti-nucleon Interactions*, 195-202
•
DOI:
- 10.1103/PhysRevD.23.2784

The pi- p ---> pi0 n charge-exchange cross-sections between 90 mev and 290 mev

et al.

- Nucl.Phys.B 26 (1971) 588-596
•
DOI:
- 10.1016/0550-3213(71)90197-0

Measurement of the pi- p --> pi0 pi0 n Reaction Cross-Section at 276-MeV

- Sov.J.Nucl.Phys. 20 (1975) 500-503,
- Yad.Fiz. 20 (1974) 942-948

Matrix Element of the Reaction pi- p --> pi0 pi0 n Near the Threshold

A.A Belkov
(
- Dubna, JINR and
- Serpukhov, IHEP
)
,
S.A. Bunyatov
(
- Dubna, JINR and
- Serpukhov, IHEP
)
,
B.Zh Zalikhanov
(
- Dubna, JINR and
- Serpukhov, IHEP
)
,
V.S. Kurbatov
(
- Dubna, JINR and
- Serpukhov, IHEP
)
,
A. Khalbaev
(
- Dubna, JINR and
- Serpukhov, IHEP
)

- Yad.Fiz. 28 (1978) 1275-1279

The Investigation of pi- p --> pi0 pi0 n and pi- p --> pi0 gamma N Reactions at 270-MeV

S.A. Bunyatov
(
- Dubna, JINR
)
,
G.V. Zholobov
(
- Serpukhov, IHEP
)
,
B.Zh. Zalikhanov
(
- Dubna, JINR
)
,
V.S. Kurbatov
(
- Dubna, JINR
)
,
M.M. Musakhanov
(
- Uzbekistan Natl. U.
)

et al.

- Sov.J.Nucl.Phys. 25 (1977) 177,
- Yad.Fiz. 25 (1977) 325-334,
- Yadern Fiz.25 (1977) 325-334 and Dubna Jinr - 9668 (76,REC.JUL) 22p

Pi- p reactions at 456, 505, and 552 mev/c

- Phys.Rev.D 2 (1970) 1790-1803
•
DOI:
- 10.1103/PhysRevD.2.1790

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