Annihilation at rest of antiprotons and protons into neutral particles

C. Amsler, A. V. Anisovich, C. A. Baker, B. M. Barnett, C. J. Batty, M. Benayoun, P. Blüm, K. Braune, D. V. Bugg, T. Case, V. Credé, K. M. Crowe, M. Doser, W. Dünnweber, D. Engelhardt, M. A. Faessler, R. P. Haddock, F. H. Heinsius, M. Heinzelmann, N. P. Hessey & 34 others P. Hidas, D. Jamnik, H. Kalinowsky, P. Kammel, J. Kisiel, E. Klempt, H. Koch, M. Kunze, U. Kurilla, R. Landua, H. Matthäy, C. A. Meyer, F. Meyer-Wildhagen, L. Montanet, R. Ouared, K. Peters, B. Pick, W. Popkov, M. Ratajczak, C. Regenfus, J. Reinnarth, W. Roethel, A. V. Sarantsev, S. Spanier, U. Strohbusch, M. Suffert, J. S. Suh, U. Thoma, I. Uman, S. Wallis-Plachner, D. Walther, U. Wiedner, K. Wittmack, B. S. Zou

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

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 π0, η, η′ and ω 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)% with which we observe the all-neutral decay modes inclusively. Since the exclusive final states are normalized to the Crystal Barrel measurement of the π0π0 branching ratio, the latter result is strongly supported by this present study.

Original languageEnglish
Pages (from-to)357-367
Number of pages11
JournalNuclear Physics A
Volume720
Issue number3-4
DOIs
Publication statusPublished - Jun 16 2003

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neutral particles
antiprotons
protons
liquid hydrogen
kaons
crystals
mesons
detectors
decay
room temperature
hydrogen
liquids

Keywords

  • Annihilation
  • Antiproton-proton
  • Neutral particles

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Amsler, C., Anisovich, A. V., Baker, C. A., Barnett, B. M., Batty, C. J., Benayoun, M., ... Zou, B. S. (2003). Annihilation at rest of antiprotons and protons into neutral particles. Nuclear Physics A, 720(3-4), 357-367. https://doi.org/10.1016/S0375-9474(03)00912-6

Annihilation at rest of antiprotons and protons into neutral particles. / 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.

In: Nuclear Physics A, Vol. 720, No. 3-4, 16.06.2003, p. 357-367.

Research output: Contribution to journalArticle

Amsler, C, Anisovich, AV, Baker, CA, Barnett, BM, Batty, CJ, Benayoun, M, Blüm, P, Braune, K, Bugg, DV, Case, T, Credé, V, Crowe, KM, Doser, M, Dünnweber, W, Engelhardt, D, Faessler, MA, Haddock, RP, Heinsius, FH, Heinzelmann, M, Hessey, NP, Hidas, P, Jamnik, D, Kalinowsky, H, Kammel, P, Kisiel, J, Klempt, E, Koch, H, Kunze, M, Kurilla, U, Landua, R, Matthäy, H, Meyer, CA, Meyer-Wildhagen, F, Montanet, L, Ouared, R, Peters, K, Pick, B, Popkov, W, Ratajczak, M, Regenfus, C, Reinnarth, J, Roethel, W, Sarantsev, AV, Spanier, S, Strohbusch, U, Suffert, M, Suh, JS, Thoma, U, Uman, I, Wallis-Plachner, S, Walther, D, Wiedner, U, Wittmack, K & Zou, BS 2003, 'Annihilation at rest of antiprotons and protons into neutral particles', Nuclear Physics A, vol. 720, no. 3-4, pp. 357-367. https://doi.org/10.1016/S0375-9474(03)00912-6
Amsler C, Anisovich AV, Baker CA, Barnett BM, Batty CJ, Benayoun M et al. Annihilation at rest of antiprotons and protons into neutral particles. Nuclear Physics A. 2003 Jun 16;720(3-4):357-367. https://doi.org/10.1016/S0375-9474(03)00912-6
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. / Annihilation at rest of antiprotons and protons into neutral particles. In: Nuclear Physics A. 2003 ; Vol. 720, No. 3-4. pp. 357-367.
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abstract = "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 π0, η, η′ and ω 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){\%} with which we observe the all-neutral decay modes inclusively. Since the exclusive final states are normalized to the Crystal Barrel measurement of the π0π0 branching ratio, the latter result is strongly supported by this present study.",
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AU - Anisovich, A. V.

AU - Baker, C. A.

AU - Barnett, B. M.

AU - Batty, C. J.

AU - Benayoun, M.

AU - Blüm, P.

AU - Braune, K.

AU - Bugg, D. V.

AU - Case, T.

AU - Credé, V.

AU - Crowe, K. M.

AU - Doser, M.

AU - Dünnweber, W.

AU - Engelhardt, D.

AU - Faessler, M. A.

AU - Haddock, R. P.

AU - Heinsius, F. H.

AU - Heinzelmann, M.

AU - Hessey, N. P.

AU - Hidas, P.

AU - Jamnik, D.

AU - Kalinowsky, H.

AU - Kammel, P.

AU - Kisiel, J.

AU - Klempt, E.

AU - Koch, H.

AU - Kunze, M.

AU - Kurilla, U.

AU - Landua, R.

AU - Matthäy, H.

AU - Meyer, C. A.

AU - Meyer-Wildhagen, F.

AU - Montanet, L.

AU - Ouared, R.

AU - Peters, K.

AU - Pick, B.

AU - Popkov, W.

AU - Ratajczak, M.

AU - Regenfus, C.

AU - Reinnarth, J.

AU - Roethel, W.

AU - Sarantsev, A. V.

AU - Spanier, S.

AU - Strohbusch, U.

AU - Suffert, M.

AU - Suh, J. S.

AU - Thoma, U.

AU - Uman, I.

AU - Wallis-Plachner, S.

AU - Walther, D.

AU - Wiedner, U.

AU - Wittmack, K.

AU - Zou, B. S.

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KW - Annihilation

KW - Antiproton-proton

KW - Neutral particles

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