Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-50552
Amsler, C; Anisovich, A V; Baker, C A; Barnett, B M; Batty , C J; Benayoun, M; Blüm, P; Braune, K; Bugg, D V; Case, T; Credé, V; Crowe, K M; Doser, M; Dünnweber, W; Engelhardt, D; Faessler, M A; Haddock, R P; Heinsius, F H; Heinzelmann, M; Hessey, N P; Hidas, P; Jamnik, D; Kalinowsky, H; Kammel, P; Kisiel, J; Klempt, E; Koch, H; Kunze, M; Kurilla, U; Landua, R; Matthäy, H; Meyer, C A; Meyer-Wildhagen, F; Montanet, L; Ouared, R; Peters, K; Pick, B; Popkov, W; Ratajczak, M; Regenfus, C; Reinnarth, J; Roethel, W; Sarantsev, A V; Spanier, S; Strohbusch, U; Suffert, M; Suh, J S; Thoma, U; Uman, I; Wallis-Plachner, S; Walther, D; Wiedner, U; Wittmack, K; Zou, B S (2003). Annihilation at rest of antiprotons and protons into neutral particles. Nuclear Physics A, 720(3-4):357-367.
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Annihilation of antiprotons and protons at rest into neutral particles has been studied with the Crystal Barrel detector at LEAR. Annihilation frequencies are determined for final states containing !0, ", "" and # mesons using a liquid and a room temperature, 12 bar, gaseous hydrogen target. Including annihilation frequencies for production of neutral kaons from other experiments, the identified reactions for annihilation in liquid hydrogen add up to a branching fraction of (3.56 ± 0.28)% per annihilation compared to the frequency of (3.50±0.30)%withwhichwe observe the allneutral decay modes inclusively. Since the exclusive final states are normalized to the Crystal Barrel measurement of the !0!0 branching ratio, the latter result is strongly supported by this present study.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Physics Institute|
|Deposited On:||04 Nov 2011 12:52|
|Last Modified:||22 Oct 2014 11:47|
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