Exclusive p[rho]0 meson photoproduction with a leading neutron at HERA
A first measurement is presented of exclusive photoproduction of $$\rho ^0$$ρ0mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years 2006 and 2007 at a centre-of-mass energy of $$\sqrt{s}=319$$s=319 GeV and correspond to an integrated luminosity of 1.1...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 January 2016
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| In: |
The European physical journal. C, Particles and fields
Year: 2016, Jahrgang: 76, Heft: 1 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-015-3863-1 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-015-3863-1
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| Verfasserangaben: | H1 Collaboration |
MARC
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| 245 | 1 | 0 | |a Exclusive p[rho]0 meson photoproduction with a leading neutron at HERA |c H1 Collaboration |
| 246 | 3 | 3 | |a Exclusive p[rho] 0 meson photoproduction with a leading neutron at HERA |
| 264 | 1 | |c 23 January 2016 | |
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| 500 | |a Im Titel ist "rho" als griechischer Buchstaben dargestellt | ||
| 500 | |a Im Titel ist "0" hochgestellt | ||
| 500 | |a H1 Collaboration: V. Andreev, A. Baghdasaryan, K. Begzsuren, A. Belousov, A. Bolz, V. Boudry, G. Brandt, V. Brisson, D. Britzger, A. Buniatyan, A. Bylinkin, L. Bystritskaya, A.J. Campbell, K.B. Cantun Avila, K. Cerny, V. Chekelian, J.G. Contreras, J. Cvach, J. B. Dainton, K. Daum, C. Diaconu, M. Dobre, V. Dodonov, G. Eckerlin, S. Egli, E. Elsen, L. Favart, A. Fedotov, J. Feltesse, J. Ferencei, M. Fleischer, A. Fomenko, E. Gabathuler, J. Gayler, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Gouzevitch, C. Grab, A. Grebenyuk, T. Greenshaw, G. Grindhammer, D. Haidt, R.C.W. Henderson, J. Hladkỳ, D. Hoffmann, R. Horisberger, T. Hreus, F. Huber, M. Jacquet, X. Janssen, H. Jung, M. Kapichine, C. Kiesling, M. Klein, C. Kleinwort, R. Kogler, P. Kostka, J. Kretzschmar, K. Krüger, M.P.J. Landon, W. Lange, P. Laycock, A. Lebedev, S. Levonian, K. Lipka, B. List, J. List, B. Lobodzinski, E. Malinovski, H.-U. Martyn, S.J. Maxfield, A. Mehta, A.B. Meyer, H. Meyer, J. Meyer, S. Mikocki, A. Morozov, K. Müller, Th. Naumann, P.R. Newman, C. Niebuhr, G. Nowak, J.E. Olsson, D. Ozerov, C. Pascaud, G. D. Patel, E. Perez, A. Petrukhin, I. Picuric, H. Pirumov, D. Pitzl, R. Plačakytė, B. Pokorny, R. Polifka, B. Povh, V. Radescu, N. Raicevic, T. Ravdandorj, P. Reimer, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, M. Rotaru, S. Rusakov, D. Šálek, D.P.C. Sankey, M. Sauter, E. Sauvan, S. Schmitt, L. Schoeffel, A. Schöning, F. Sefkow, S. Shushkevich, Y. Soloviev, P. Sopicki, D. South, V. Spaskov, A. Specka, M. Steder, B. Stella, U. Straumann, T. Sykora, P.D. Thompson, D. Traynor, P. Truöl, I. Tsakov, B. Tseepeldorj, J. Turnau, A. Valkárová, C. Vallée, P. Van Mechelen, Y. Vazdik, D. Wegener, E. Wünsch, J. Žáček, Z. Zhang, R. Žlebčík, H. Zohrabyan, F. Zomer | ||
| 500 | |a Gesehen am 18.08.2020 | ||
| 520 | |a A first measurement is presented of exclusive photoproduction of $$\rho ^0$$ρ0mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years 2006 and 2007 at a centre-of-mass energy of $$\sqrt{s}=319$$s=319 GeV and correspond to an integrated luminosity of 1.16 pb$$^{-1}$$-1. The $$\rho ^0$$ρ0mesons with transverse momenta $$p_T<1$$pT<1 GeV are reconstructed from their decays to charged pions, while leading neutrons carrying a large fraction of the incoming proton momentum, $$x_L>0.35$$xL>0.35, are detected in the Forward Neutron Calorimeter. The phase space of the measurement is defined by the photon virtuality $$Q^2 < 2$$Q2<2 GeV$$^2$$2, the total energy of the photon-proton system $$20 < W_{\gamma p}< 100$$20<Wγp<100 GeV and the polar angle of the leading neutron $$\theta _n < 0.75$$θn<0.75mrad. The cross section of the reaction $$\gamma p \rightarrow \rho ^0 n \pi ^+$$γp→ρ0nπ+is measured as a function of several variables. The data are interpreted in terms of a double peripheral process, involving pion exchange at the proton vertex followed by elastic photoproduction of a $$\rho ^0$$ρ0meson on the virtual pion. In the framework of one-pion-exchange dominance the elastic cross section of photon-pion scattering, $$\sigma ^\mathrm{el}(\gamma \pi ^+ \rightarrow \rho ^0\pi ^+)$$σel(γπ+→ρ0π+), is extracted. The value of this cross section indicates significant absorptive corrections for the exclusive reaction $$\gamma p \rightarrow \rho ^0 n \pi ^+$$γp→ρ0nπ+. | ||
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