Search for Experimental Evidence on Exclusive Double-Pomeron Exchange

Experience with single diffraction is used to motivate a proposed definition for the phase-space region of exclusive double-pomeron exchange (DPE); the definition involves two ratios of missing-mass to total energy. The kinematical implications of the proposed definition are explored through a triangle plot in Z variables - the logarithms of these ratios - and the problem of background is analyzed through a double-Regge expansion. It is shown that forthcoming NAL experiments should have no difficulty in establishing the presence or absence of exclusive double pomeron exchange. The results of previous attempts to measure DPE are reconsidered in terms of the Z variables, and it is found that the statistics accumulated to date are inadequate. Recent 205 GeV/ c NAL experiments on π − p → p π − π + π − and pp → pp π + π − are discussed in some detail.

References(14)

Figures(0)

Feynman Rules for Regge Particles

T.W.B. Kibble
(
- Imperial Coll., London
)

- Phys.Rev. 131 (1963) 2282-2291
•
DOI:
- 10.1103/PhysRev.131.2282

- Sov.Phys.JETP 17 2331

How well does an lps analysis separate production mechanisms in pi+ p interactions at 8-GeV and 16-GeV/c?

Aachen-Berlin-Bonn-CERN-Heidelberg

Collaboration

•

J.V. Beaupre
(
- Aachen, Tech. Hochsch.
)

et al.

- Nucl.Phys.B 46 (1972) 1-20
•
DOI:
- 10.1016/0550-3213(72)90197-6

Single and double dissociation in pi- p collisions at 11-GeV and 16-GeV/c

Collaborations

•

W. Kittel
(
- CERN
)

et al.

- Nucl.Phys.B 30 (1971) 333-373
•
DOI:
- 10.1016/0550-3213(71)90166-0

Experimental consistency of multi-reggeism in a high-energy reaction

R. Lipes
(
- Caltech, Kellogg Lab
)
,
G. Zweig
(
- Caltech, Kellogg Lab
)
,
W. Robertson
(
- Wisconsin U., Madison
)

- Phys.Rev.Lett. 22 (1969) 433-437
•
DOI:
- 10.1103/PhysRevLett.22.433

The problem of the relation between double pomeron exchange in inclusive and exclusive experiments

C.H. Mehta
(
- UC, San Diego
)
,
D. Silverman
(
- UC, Irvine
)

- Nucl.Phys.B 52 (1973) 77-95
•
DOI:
- 10.1016/0550-3213(73)90087-4

Analysis of the reaction p p ---> p(pi pi)0 p, and the question of double pomeron exchange in high-energy production processes

et al.

- Nucl.Phys.B 53 (1973) 282-288
•
DOI:
- 10.1016/0550-3213(73)90445-8

Double-Pomeron Exchange Contribution to the Reaction $pp \to pp\pi^+ \pi^-$ at 205 GeV/c.

- Phys.Rev.Lett. 32 (1974) 80-82,
- PHYS. REV. LETTERS 32 (1974) 80-82 AND ARGONNE NATIONAL LAB - ANL/HEP-7339 (REC.OCT 73) 11 P
•
DOI:
- 10.1103/PhysRevLett.32.80

Momentum spectrum of hadronic secondaries in the multiperipheral model

Carleton E. DeTar
(
- UC, Berkeley
)

- Phys.Rev.D 3 (1971) 128-144
•
DOI:
- 10.1103/PhysRevD.3.128

The Reaction $pp \to pp\pi^+ \pi^-$ at 205 GeV/c.

- Phys.Rev.D 9 (1974) 1215,
- Argonne National Lab - ANL/HEP 7354
•
DOI:
- 10.1103/PhysRevD.9.1215

Multiple-Production Theory Via Toller Variables

- Phys.Rev.Lett. 19 (1967) 614-618
•
DOI:
- 10.1103/PhysRevLett.19.614

Description of the triple-regge region with a very large triple-pomeron coupling and a bare pomeron

J.W. Dash
(
- Argonne
)

- Phys.Rev.D 9 (1974) 200-207
•
DOI:
- 10.1103/PhysRevD.9.200

Can and does the pomeron occur more than once in a single process?

R. Shankar
(
- LBL, Berkeley
)

- Nucl.Phys.B 70 (1974) 168-188
•
DOI:
- 10.1016/0550-3213(74)90367-8

- Nuovo Cim.A 49 157