First observations of Pontecorvo reactions with a recoiling neutron

C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker, B. M. Barnett, C. J. Batty, K. Beuchert, P. Birien, P. Blüm, R. Bossingham, K. Braune, J. Brose, D. V. Bugg, M. Burchell, T. Case, A. Cooper, O. Cramer, K. M. Crowe, T. Degener, H. P. DietzS. v. Dombrowski, M. Doser, W. Dünnweber, D. Engelhardt, M. Englert, M. A. Faessler, C. Felix, R. Hackmann, R. P. Haddock, F. H. Heinsius, M. Herz, N. P. Hessey, P. Hidas, P. Illinger, D. Jamnik, H. Kalinowsky, B. Kämmle, T. Kiel, J. Kisiel, E. Klempt, M. Kobel, H. Koch, C. Kolo, K. Königsmann, J. Kuhn, M. Kunze, M. Lakata, R. Landua, J. Lüdemann, H. Matthäy, M. Merkel, J. P. Merlo, C. A. Meyer, L. Montanet, A. Noble, F. Ould-Saada, K. Peters, C. N. Pinder, G. Pinter, S. Ravndal, E. Schäfer, P. Schmidt, S. Spanier, H. Stöck, C. Straßburger, U. Strohbusch, M. Suffert, U. Thoma, D. Urner, C. Völcker, F. Walter, D. Walther, U. Wiedner, N. Winter, J. Zoll, B. S. Zou, Č Zupančič

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report the first observations of Pontecorvo reactions of the type -pd →Xn. We fully reconstruct the outgoing meson and, for antiprotons stopped in liquid deuterium, we measure: BR(-pd→π0)=(7.03±0.72)×10-6, BR(-pd→ηn)=(3.19+0.48)×10-6, BR(-pd→ωn)=(22.8+4.1)×10-6, BR(-pd→η′n)14×10-6 (at 95% confidence level). Assuming charge independence, our result for - pd→π0n is compatible with measurements of the only other observed Pontecorvo reaction -pd → π-p. The experimental ratios between the above branching ratios are in fair agreement with both the statistical model and dynamical two-step models (assuming N- N annihilation into two mesons, with subsequent absorption of one meson on the remaining nucleon). This agreement suggests that there may be appreciable rates for Pontecorvo reactions producing final state mesons with masses above 1 GeV.

Original languageEnglish
Pages (from-to)325-331
Number of pages7
JournalZeitschrift für Physik A Hadrons and Nuclei
Volume351
Issue number3
DOIs
Publication statusPublished - Sep 1995

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recoilings
mesons
neutrons
antiprotons
deuterium
confidence
liquids

Keywords

  • 25.43

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Amsler, C., Armstrong, D. S., Augustin, I., Baker, C. A., Barnett, B. M., Batty, C. J., ... Zupančič, Č. (1995). First observations of Pontecorvo reactions with a recoiling neutron. Zeitschrift für Physik A Hadrons and Nuclei, 351(3), 325-331. https://doi.org/10.1007/BF01290916

First observations of Pontecorvo reactions with a recoiling neutron. / Amsler, C.; Armstrong, D. S.; Augustin, I.; Baker, C. A.; Barnett, B. M.; Batty, C. J.; Beuchert, K.; Birien, P.; Blüm, P.; Bossingham, R.; Braune, K.; Brose, J.; Bugg, D. V.; Burchell, M.; Case, T.; Cooper, A.; Cramer, O.; Crowe, K. M.; Degener, T.; Dietz, H. P.; Dombrowski, S. v.; Doser, M.; Dünnweber, W.; Engelhardt, D.; Englert, M.; Faessler, M. A.; Felix, C.; Hackmann, R.; Haddock, R. P.; Heinsius, F. H.; Herz, M.; Hessey, N. P.; Hidas, P.; Illinger, P.; Jamnik, D.; Kalinowsky, H.; Kämmle, B.; Kiel, T.; Kisiel, J.; Klempt, E.; Kobel, M.; Koch, H.; Kolo, C.; Königsmann, K.; Kuhn, J.; Kunze, M.; Lakata, M.; Landua, R.; Lüdemann, J.; Matthäy, H.; Merkel, M.; Merlo, J. P.; Meyer, C. A.; Montanet, L.; Noble, A.; Ould-Saada, F.; Peters, K.; Pinder, C. N.; Pinter, G.; Ravndal, S.; Schäfer, E.; Schmidt, P.; Spanier, S.; Stöck, H.; Straßburger, C.; Strohbusch, U.; Suffert, M.; Thoma, U.; Urner, D.; Völcker, C.; Walter, F.; Walther, D.; Wiedner, U.; Winter, N.; Zoll, J.; Zou, B. S.; Zupančič, Č.

In: Zeitschrift für Physik A Hadrons and Nuclei, Vol. 351, No. 3, 09.1995, p. 325-331.

Research output: Contribution to journalArticle

Amsler, C, Armstrong, DS, Augustin, I, Baker, CA, Barnett, BM, Batty, CJ, Beuchert, K, Birien, P, Blüm, P, Bossingham, R, Braune, K, Brose, J, Bugg, DV, Burchell, M, Case, T, Cooper, A, Cramer, O, Crowe, KM, Degener, T, Dietz, HP, Dombrowski, SV, Doser, M, Dünnweber, W, Engelhardt, D, Englert, M, Faessler, MA, Felix, C, Hackmann, R, Haddock, RP, Heinsius, FH, Herz, M, Hessey, NP, Hidas, P, Illinger, P, Jamnik, D, Kalinowsky, H, Kämmle, B, Kiel, T, Kisiel, J, Klempt, E, Kobel, M, Koch, H, Kolo, C, Königsmann, K, Kuhn, J, Kunze, M, Lakata, M, Landua, R, Lüdemann, J, Matthäy, H, Merkel, M, Merlo, JP, Meyer, CA, Montanet, L, Noble, A, Ould-Saada, F, Peters, K, Pinder, CN, Pinter, G, Ravndal, S, Schäfer, E, Schmidt, P, Spanier, S, Stöck, H, Straßburger, C, Strohbusch, U, Suffert, M, Thoma, U, Urner, D, Völcker, C, Walter, F, Walther, D, Wiedner, U, Winter, N, Zoll, J, Zou, BS & Zupančič, Č 1995, 'First observations of Pontecorvo reactions with a recoiling neutron', Zeitschrift für Physik A Hadrons and Nuclei, vol. 351, no. 3, pp. 325-331. https://doi.org/10.1007/BF01290916
Amsler C, Armstrong DS, Augustin I, Baker CA, Barnett BM, Batty CJ et al. First observations of Pontecorvo reactions with a recoiling neutron. Zeitschrift für Physik A Hadrons and Nuclei. 1995 Sep;351(3):325-331. https://doi.org/10.1007/BF01290916
Amsler, C. ; Armstrong, D. S. ; Augustin, I. ; Baker, C. A. ; Barnett, B. M. ; Batty, C. J. ; Beuchert, K. ; Birien, P. ; Blüm, P. ; Bossingham, R. ; Braune, K. ; Brose, J. ; Bugg, D. V. ; Burchell, M. ; Case, T. ; Cooper, A. ; Cramer, O. ; Crowe, K. M. ; Degener, T. ; Dietz, H. P. ; Dombrowski, S. v. ; Doser, M. ; Dünnweber, W. ; Engelhardt, D. ; Englert, M. ; Faessler, M. A. ; Felix, C. ; Hackmann, R. ; Haddock, R. P. ; Heinsius, F. H. ; Herz, M. ; Hessey, N. P. ; Hidas, P. ; Illinger, P. ; Jamnik, D. ; Kalinowsky, H. ; Kämmle, B. ; Kiel, T. ; Kisiel, J. ; Klempt, E. ; Kobel, M. ; Koch, H. ; Kolo, C. ; Königsmann, K. ; Kuhn, J. ; Kunze, M. ; Lakata, M. ; Landua, R. ; Lüdemann, J. ; Matthäy, H. ; Merkel, M. ; Merlo, J. P. ; Meyer, C. A. ; Montanet, L. ; Noble, A. ; Ould-Saada, F. ; Peters, K. ; Pinder, C. N. ; Pinter, G. ; Ravndal, S. ; Schäfer, E. ; Schmidt, P. ; Spanier, S. ; Stöck, H. ; Straßburger, C. ; Strohbusch, U. ; Suffert, M. ; Thoma, U. ; Urner, D. ; Völcker, C. ; Walter, F. ; Walther, D. ; Wiedner, U. ; Winter, N. ; Zoll, J. ; Zou, B. S. ; Zupančič, Č. / First observations of Pontecorvo reactions with a recoiling neutron. In: Zeitschrift für Physik A Hadrons and Nuclei. 1995 ; Vol. 351, No. 3. pp. 325-331.
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abstract = "We report the first observations of Pontecorvo reactions of the type -pd →Xn. We fully reconstruct the outgoing meson and, for antiprotons stopped in liquid deuterium, we measure: BR(-pd→π0)=(7.03±0.72)×10-6, BR(-pd→ηn)=(3.19+0.48)×10-6, BR(-pd→ωn)=(22.8+4.1)×10-6, BR(-pd→η′n)14×10-6 (at 95{\%} confidence level). Assuming charge independence, our result for - pd→π0n is compatible with measurements of the only other observed Pontecorvo reaction -pd → π-p. The experimental ratios between the above branching ratios are in fair agreement with both the statistical model and dynamical two-step models (assuming N- N annihilation into two mesons, with subsequent absorption of one meson on the remaining nucleon). This agreement suggests that there may be appreciable rates for Pontecorvo reactions producing final state mesons with masses above 1 GeV.",
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TY - JOUR

T1 - First observations of Pontecorvo reactions with a recoiling neutron

AU - Amsler, C.

AU - Armstrong, D. S.

AU - Augustin, I.

AU - Baker, C. A.

AU - Barnett, B. M.

AU - Batty, C. J.

AU - Beuchert, K.

AU - Birien, P.

AU - Blüm, P.

AU - Bossingham, R.

AU - Braune, K.

AU - Brose, J.

AU - Bugg, D. V.

AU - Burchell, M.

AU - Case, T.

AU - Cooper, A.

AU - Cramer, O.

AU - Crowe, K. M.

AU - Degener, T.

AU - Dietz, H. P.

AU - Dombrowski, S. v.

AU - Doser, M.

AU - Dünnweber, W.

AU - Engelhardt, D.

AU - Englert, M.

AU - Faessler, M. A.

AU - Felix, C.

AU - Hackmann, R.

AU - Haddock, R. P.

AU - Heinsius, F. H.

AU - Herz, M.

AU - Hessey, N. P.

AU - Hidas, P.

AU - Illinger, P.

AU - Jamnik, D.

AU - Kalinowsky, H.

AU - Kämmle, B.

AU - Kiel, T.

AU - Kisiel, J.

AU - Klempt, E.

AU - Kobel, M.

AU - Koch, H.

AU - Kolo, C.

AU - Königsmann, K.

AU - Kuhn, J.

AU - Kunze, M.

AU - Lakata, M.

AU - Landua, R.

AU - Lüdemann, J.

AU - Matthäy, H.

AU - Merkel, M.

AU - Merlo, J. P.

AU - Meyer, C. A.

AU - Montanet, L.

AU - Noble, A.

AU - Ould-Saada, F.

AU - Peters, K.

AU - Pinder, C. N.

AU - Pinter, G.

AU - Ravndal, S.

AU - Schäfer, E.

AU - Schmidt, P.

AU - Spanier, S.

AU - Stöck, H.

AU - Straßburger, C.

AU - Strohbusch, U.

AU - Suffert, M.

AU - Thoma, U.

AU - Urner, D.

AU - Völcker, C.

AU - Walter, F.

AU - Walther, D.

AU - Wiedner, U.

AU - Winter, N.

AU - Zoll, J.

AU - Zou, B. S.

AU - Zupančič, Č

PY - 1995/9

Y1 - 1995/9

N2 - We report the first observations of Pontecorvo reactions of the type -pd →Xn. We fully reconstruct the outgoing meson and, for antiprotons stopped in liquid deuterium, we measure: BR(-pd→π0)=(7.03±0.72)×10-6, BR(-pd→ηn)=(3.19+0.48)×10-6, BR(-pd→ωn)=(22.8+4.1)×10-6, BR(-pd→η′n)14×10-6 (at 95% confidence level). Assuming charge independence, our result for - pd→π0n is compatible with measurements of the only other observed Pontecorvo reaction -pd → π-p. The experimental ratios between the above branching ratios are in fair agreement with both the statistical model and dynamical two-step models (assuming N- N annihilation into two mesons, with subsequent absorption of one meson on the remaining nucleon). This agreement suggests that there may be appreciable rates for Pontecorvo reactions producing final state mesons with masses above 1 GeV.

AB - We report the first observations of Pontecorvo reactions of the type -pd →Xn. We fully reconstruct the outgoing meson and, for antiprotons stopped in liquid deuterium, we measure: BR(-pd→π0)=(7.03±0.72)×10-6, BR(-pd→ηn)=(3.19+0.48)×10-6, BR(-pd→ωn)=(22.8+4.1)×10-6, BR(-pd→η′n)14×10-6 (at 95% confidence level). Assuming charge independence, our result for - pd→π0n is compatible with measurements of the only other observed Pontecorvo reaction -pd → π-p. The experimental ratios between the above branching ratios are in fair agreement with both the statistical model and dynamical two-step models (assuming N- N annihilation into two mesons, with subsequent absorption of one meson on the remaining nucleon). This agreement suggests that there may be appreciable rates for Pontecorvo reactions producing final state mesons with masses above 1 GeV.

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JO - Zeitschrift fur Physik A Hadrons and Nuclei

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