Left-right asymmetry in anti-p p ---> pi- pi+

Bathas, George; Kloet, W.M.

doi:10.1103/PhysRevC.47.2207

Left-right asymmetry in anti-p p ---> pi- pi+

George Bathas
(
- Rutgers U., Piscataway
)
,
W.M. Kloet
(
- Rutgers U., Piscataway and
- Orsay, IPN
)

Apr 13, 1993

19 pages

Published in:

Phys.Rev.C 47 (1993) 2207-2212

e-Print:

nucl-th/9303012 [nucl-th]

DOI:

10.1103/PhysRevC.47.2207

Report number:

RU-9305

View in:

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Abstract:

Results for d

\sigma

/d

\Omega

and

A_N

in the reaction

\bar{p}p \rightarrow \pi~- \pi~+

are predicted by a simple quark model. They are compared to recent experimental data from LEAR, as well as to previous predictions from nucleon-exchange models. At low energy the quark model does better than the nucleon-exchange models, but the overall comparison to experiment remains poor. In particular, the double-dip structure of the experimental

A_N

data is only partly represented. This shortcoming of the simple quark model is traced back to a too small J=2 amplitude. This has interesting implications for the range of this specific annihilation process.

anti-p p: annihilation
annihilation: anti-p p
pi: pair production
pair production: pi
angular distribution: asymmetry
asymmetry: angular distribution
differential cross section: angular dependence
angular dependence: differential cross section
analyzing power: angular dependence
partial wave

References(13)

Figures(0)

- Nucl.Phys.B 69 109

Measurement of the Polarization Parameter for anti-Proton-Proton Annihilation Into Charged Pion and Kaon Pairs Between 1.0-GeV/c and 2.2-GeV/c

A.A. Carter
(
- Queen Mary, U. of London
)
,
M. Coupland
(
- Queen Mary, U. of London
)
,
E. Eisenhandler
(
- Queen Mary, U. of London
)
,
C. Franklyn
(
- Queen Mary, U. of London
)
,
W.R. Gibson
(
- Queen Mary, U. of London
)

et al.

- Nucl.Phys.B 127 (1977) 202,
- Stockholm Sympos.1976:117
•
DOI:
- 10.1016/0550-3213(77)90212-7

OBSERVATION OF AN ENHANCEMENT IN ANTI-P P ---> PI+ PI- AND ANTI-P P ---> K+ K- CROSS-SECTIONS AT ANTI-P MOMENTUM OF APPROXIMATELY 500-MEV/C

et al.

- Phys.Rev.Lett. 55 (1985) 1835-1838,
- Phys. Rev. Lett. 55 ( 1985) 1835-1838
•
DOI:
- 10.1103/PhysRevLett.55.1835

The Physics of nucleon - anti-nucleon annihilation

- Prog.Part.Nucl.Phys. 29 (1992) 87-174
•
DOI:
- 10.1016/0146-6410(92)90004-L

ANTI-NUCLEON NUCLEON ANNIHILATIONS INTO TWO MESONS

B. Moussallam
(
- Orsay, IPN
)

- Nucl.Phys.A 407 (1983) 413-428,
- Nucl. Phys. A407 ( 1983) 413-428
•
DOI:
- 10.1016/0375-9474(83)90659-0

ANTI-P P ---> PI PI IN A BARYON EXCHANGE POTENTIAL MODEL

B. Moussallam
(
- SUNY, Stony Brook
)

- Nucl.Phys.A 429 (1984) 429-444,
- Nucl. Phys. A429 ( 1984) 429-444
•
DOI:
- 10.1016/0375-9474(84)90690-0

Meson - baryon dynamics in the nucleon - anti-nucleon system. 2. Annihilation into two mesons

- Phys.Rev.C 44 (1991) 1337-1353
•
DOI:
- 10.1103/PhysRevC.44.1337

Generalized p wave triplet and S wave triplet annihilation potentials for anti-p p decay into two mesons based on a simple quark model

- Phys.Lett.B 301 (1993) 155-158,
- Phys. Lett. B301 (1993) 155-158 and Rutgers Univ. Piscataway - RU-92-048 (92,rec.Apr.93) 9 p
•
e-Print:
- nucl-th/9303002
•
DOI:
- 10.1016/0370-2693(93)90681-7

On the Nucleon - anti-Nucleon Optical Potential

J. Cote
(
- Orsay, IPN and
- Paris U., VI-VII
)
,
M. Lacombe
(
- Orsay, IPN and
- Paris U., VI-VII
)
,
B. Loiseau
(
- Orsay, IPN and
- Paris U., VI-VII
)
,
B. Moussallam
(
- Orsay, IPN and
- Paris U., VI-VII
)
,
R. Vinh Mau
(
- Orsay, IPN and
- Paris U., VI-VII
)

- Phys.Rev.Lett. 48 (1982) 1319
•
DOI:
- 10.1103/PhysRevLett.48.1319

Role of final state interactions in the p p ---> pi+ pi- annihilation process

V. Mull
(
- Julich, Forschungszentrum
)
,
K. Holinde
(
- Julich, Forschungszentrum
)
,
J. Speth
(
- Julich, Forschungszentrum
)

- Phys.Lett.B 275 (1992) 12-18
•
DOI:
- 10.1016/0370-2693(92)90843-S

Exploration of the Anti-p $p \to \pi \pi$ Channel in the Resonance Region

Alan D. Martin
(
- Durham U.
)
,
M.R. Pennington
(
- Durham U.
)

- Nucl.Phys.B 169 (1980) 216-240
•
DOI:
- 10.1016/0550-3213(80)90030-9

Measurement of Differential Cross-Sections for anti-Proton-Proton Annihilation Into Charged Pion and Kaon Pairs Between 0.79-GeV/c and 2.43-GeV/c

et al.

- Nucl.Phys.B 96 (1975) 109-154
•
DOI:
- 10.1016/0550-3213(75)90461-7

Asymmetry measurements in anti-proton proton annihilation into two mesons at low- energies

F. Tessarotto
(
- Trieste U.
)
,
R. Birsa
(
- Trieste U.
)
,
F. Bradamante
(
- Trieste U.
)
,
S. Dalla Torre-Colautti
(
- Trieste U.
)
,
A. Martin
(
- Trieste U.
)

et al.

- Nucl.Phys.B Proc.Suppl. 8 (1989) 141-148,
- In *Mainz 1988, Proceedings, Proton-antiproton interactions and fundamental symmetries* 141-148
•
DOI:
- 10.1016/0920-5632(89)90214-4