Annihilation of anti-protons at rest in H-2 and D-2: S versus P state capture

Reifenroether, G.; Klempt, E.

doi:10.1016/0370-2693(90)90176-7

Annihilation of anti-protons at rest in H-2 and D-2: S versus P state capture

1990

8 pages

Published in:

Phys.Lett.B 245 (1990) 129-136

Published: 1990

DOI:

10.1016/0370-2693(90)90176-7

View in:

ADS Abstract Service

reference search50 citations

Citations per year

Abstract: (Elsevier)

We discuss the fraction of P wave annihilations in antiprotonic hydrogen and deuterium atoms. In the case of antiprotonic hydrogen, experimental data and the results of a model for the atomic cascade are in good agreement. For antiprotonic deuterium there are conflicting experimental results: one high statistics experiment found that P wave annihilation in liquid D 2 is small, in agreement with cascade calculations. Several low statistics experiment found, however, P wave contributions of about 50%. Possible origins of this discrepancy are discussed.

anti-p p: annihilation
annihilation: anti-p p
atom: hadronic atom
anti-p: hadronic atom
hydrogen: hadronic atom
deuterium: hadronic atom
partial wave
model: cascade
meson: pair production
pair production: meson

References(34)

Figures(0)

[1]

Observation of $\bar{p} p \to 2 \pi^0$ at Rest: Evidence Concerning $s$ State Annihilation

et al.

- Phys.Rev.Lett. 27 (1971) 1614
•
DOI:
- 10.1103/PhysRevLett.27.1614

[2]

R. Bizzarri

- Nucl.Phys.B 690 (1974) 298

[2]

R. Bizzarri

- Nucl.Phys.B 690 (1974) 307

[3]

T.B. Day
,
G.A. Snow
,
J. Sucher

- Phys.Rev. 3 (1960) 864

[4]

Negative Meson Absorption in Liquid Hydrogen

M. Leon
(
- Cornell U., LNS
)
,
H.A. Bethe
(
- Cornell U., LNS
)

- Phys.Rev. 127 (1962) 636-647
•
DOI:
- 10.1103/PhysRev.127.636

[4]

X-ray yields in protonium and mesic hydrogen

E. Borie
(
- Karlsruhe U., TTP
)
,
M. Leon
(
- Los Alamos
)

- Phys.Rev.A 21 (1980) 5, 1460
•
DOI:
- 10.1103/PhysRevA.21.1460

[5]

G. Bassompierre

- Proc.4th European Antiproton Symp.(Barr) Vol.I (1978) 139

[6]

Experimental Determination of the Branching Ratios $p \bar{p} \to 2 \pi^0$ , $\pi^0 \gamma$ , and 2 $\gamma$ at Rest

et al.

- Z.Phys.C 35 (1987) 15,
- Z. Phys. C35 ( 1987) 15-19 and CERN Geneva - CERN-EP 86-154 (86,REC.OCT.) 9p
•
DOI:
- 10.1007/BF01561050

[7]

Anti-proton Proton Annihilation at Rest Into $\pi^0$ M and $\gamma$ M With M = $\phi$ , $\eta^\prime$ , $\omega$ , $\rho^0$ , $\eta$ , and $\pi^0$

Fukui-KEK-Kyoto Sangyo-Osaka-Tokyo Metropolitan

Collaboration

•

M. Chiba

et al.

- Phys.Rev.D 38 (1988) 2021
•
DOI:
- 10.1103/PhysRevD.38.2021

[8]

$\bar{p} p$ Annihilation Into $\pi^+ \pi^-$ and $K^+ K^-$ From Atomic $p$ States

ASTERIX

Collaboration

•

M. Doser
(
- Zurich U.
)

et al.

- Nucl.Phys.A 486 (1988) 493-511
•
DOI:
- 10.1016/0375-9474(88)90159-5

[9]

$\bar{P} P$ Annihilation Into $K^0 \bar{K}$ 0 in Hydrogen Gas

ASTERIX

Collaboration

•

M. Doser
(
- Zurich U.
)

et al.

- Phys.Lett.B 215 (1988) 792-798,
- Nucl.Phys.B Proc.Suppl. 8 (1989) 213-214,
- In *Mainz 1988, Proceedings, Proton-antiproton interactions and fundamental symmetries* 213-214
•
DOI:
- 10.1016/0370-2693(88)90063-9

[10]

Observations on anti-p d annihilations at rest into two pions

L. Gray
(
- Democritos Nucl. Res. Ctr.
)
,
T. Papadopoulou
(
- Democritos Nucl. Res. Ctr.
)
,
E. Simopoulou
(
- Democritos Nucl. Res. Ctr.
)
,
A. Vayaki
(
- Democritos Nucl. Res. Ctr.
)
,
T. Kalogeropoulos
(
- Syracuse U.
)

et al.

- Phys.Rev.Lett. 30 (1973) 1091-1094
•
DOI:
- 10.1103/PhysRevLett.30.1091

[11]

Anti-proton Annihilations in Deuterium at Rest Into Two Pions: Evidence for $\bar{P} N$ Bound States Near Threshold

D. Bridges
(
- Syracuse U.
)
,
H. Brown
(
- BNL, NSLS
)
,
Inder K. Daftari
(
- Syracuse U.
)
,
R. Debbe
(
- Case Western Reserve U.
)
,
A. Deguzman
(
- Syracuse U.
)

et al.

- Phys.Lett.B 180 (1986) 313-318,
- Phys. Lett. B180 ( 1986) 313-318
•
DOI:
- 10.1016/0370-2693(86)90317-5

[12]

A Measurement of the S and $P$ Wave Content of Anti-proton Annihilation at Rest Into Two Pions in Liquid Deuterium

Athens-Irvine-Karlsruhe-New Mexico-Pennsylvania State

Collaboration

•

A. Angelopoulos
(
- Athens U.
)

et al.

- Phys.Lett.B 212 (1988) 129-132
•
DOI:
- 10.1016/0370-2693(88)91249-X

[13]

J. Riedelberger

- Phys.Rev.C 39 (1989) 2717

[14]

Anti-protonic Hydrogen: From Atomic Capture to Annihilation

- Nucl.Phys.A 503 (1989) 885-898
•
DOI:
- 10.1016/0375-9474(89)90445-4

[14]

Leichte antiprotonische Atome: Von der Bildung bis zur Vernichtung

G. Reifenröther

[15]

ANTI-PROTONIC HYDROGEN ATOMS

C.J. Batty
(
- Rutherford
)

- Rept.Prog.Phys. 52 (1989) 1165-1216,
- REP. PROG. PHYS. 52 (1989) 1165-1216 AND CHILTON RUTHERFORD LAB. - RAL-89-065 (89,REC.AUG.) 112p
•
DOI:
- 10.1088/0034-4885/52/10/001