Search for narrow pp states in baryon exchange reactions

Ajaltouni, Z.; Benkheiri, P.; Chaurand, B.; Rougé, A.; Wuthrick, J.P.; Bachman, L.; Bogdanski, M.; Dorsaz, L.; Fluri, L.; Perrin, D.; Bellefon, A. de; Billoir, P.; Brunet, J. M.; Frenkiel, P.; Triscos, P.; Tristram, G.; Volte, A.; Ferrer, A.; Sonderegger, P.

doi:10.1016/0550-3213(82)90257-7

Cited by 12 publications

(23 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The layout of the spectrometer as used in the WA56 experiment ( Figure 2) is described in detail in [1,7]. We recall here that the main trigger requirement was the detection of a fast forward proton with momentum greater than 10 (7) GeV/c in + p ( p) reactions at an incident momentum of 20 (12) GeV/c.…”

Section: Experimental Details 21 Setup and Exposuresmentioning

confidence: 99%

“…The specic goal of the WA56 experiment [1] was to conrm two narrow pp states of masses 2.02 and 2.20 GeV/c 2 which have been observed by Benkheiri et al in p interactions at 9 and 12 GeV/c [2]. The observed states were interpreted as produced via the mechanism of backward production in association with fast forward (1232) and N(1520) baryons, following a quasi-two-body process (the diagram corresponding to such a process is presented in Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

“…In the analysis of reaction (6) it was shown that, in baryon exchange induced reactions, the central region is particularly suitable for meson spectroscopy studies, providing a good signal/background ratio. The work described in this paper results from the continuation of the investigations in the central region, with events of reactions (1) to (5), which can be represented by diagrams similar to that in Figure 1b, with ; f mesons replaced by exotic objects decaying to pp (an example of such a diagram, central production of pp state via double exchange is depicted in Figure 1c). In each of the reactions (1-5) we have found a signal of the 2.02 GeV/c 2 pp state, in a restricted kinematic region close to the central one, namely in the band of pp system c.m.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comprehensive evidence for a narrow

et al. 1999

Self Cite

View full text Add to dashboard Cite

We report evidence for the existence of a narrow pp state with a mass of 2.02 GeV/c 2 and a width below 10 MeV/c 2 produced in + p(p) interactions at 20(12) GeV/c in six nal states, proceeding via baryon exchange mechanism, that could be interpreted as a baryonium candidate. The data come from a new analysis of WA56 experiment made with the CERN spectrometer. Our results are based on the study of an unexplored kinematic region of baryon exchange processes, the central production of mesons. An agreement is found between our results and an earlier observation of this state, and an explanation is given why it was not seen in several other experiments.

show abstract

Section: Experimental Details 21 Setup and Exposuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comprehensive evidence for a narrow

et al. 1999

Self Cite

View full text Add to dashboard Cite

show abstract

“…The layout of the spectrometer as used in the WA56 experiment is described in detail in [11,12]. We recall here that the main trigger requirement was the detection of a fast forward proton with momentum greater than 10 (7) GeV/c in + p ( p) reactions at the incident momentum 20 (12) GeV/c.…”

Section: Brief Description Of the Wa56 Set-upmentioning

confidence: 99%

“…This conguration corresponds physically to the baryon exchange processes (so-called backward production). We use the data of WA56 experiment [11] carried out at CERN in the 1980's with the aim to look for baryonium in baryon exchange processes. A very large excess 1 In ref.…”

Section: Introductionmentioning

confidence: 99%