/ nucl-ex arXiv:1505.06184

$K^{*}(892)^{+}$ production in proton-proton collisions at $E_{\rm beam} = 3.5$ GeV

Agakishiev, G. (Dubna, JINR) ; Arnold, O. (COSM, Hampton) ; Belver, D. (Santiago de Compostela U.) ; Belyaev, A. (Dubna, JINR) ; Berger-Chen, J.C. (COSM, Hampton) ; Blanco, A. (LIP, Coimbra) ; Bohmer, M. (Munich, Tech. U.) ; Boyard, J.L. (Orsay) ; Cabanelas, P. (Santiago de Compostela U.) ; Chernenko, S. (Dubna, JINR) ; Dybczak, A. (Jagiellonian U.) ; Epple, E. (COSM, Hampton) ; Fabbietti, L. (COSM, Hampton) ; Fateev, O. (Dubna, JINR) ; Finocchiaro, P. (INFN, Catania) ; Fonte, P. (Coimbra Inst. Sup. Eng.) ; Friese, J. (Munich, Tech. U.) ; Frohlich, I. (Frankfurt U.) ; Galatyuk, T. (Darmstadt, EMMI) ; Garzon, J.A. (Santiago de Compostela U.) ; Gernhauser, R. (Munich, Tech. U.) ; Gobel, K. (Frankfurt U.) ; Golubeva, M. (Moscow, INR) ; Gonzalez-Diaz, D. (Darmstadt, Tech. Hochsch.) ; Guber, F. (Moscow, INR) ; Gumberidze, M. (Darmstadt, EMMI) ; Heinz, T. (Darmstadt, GSI) ; Hennino, T. (Orsay) ; Holzmann, R. (Darmstadt, GSI) ; Ierusalimov, A. (Dubna, JINR) ; Iori, I. (Milan U.) ; Ivashkin, A. (Moscow, INR) ; Jurkovic, M. (Munich, Tech. U.) ; Kampfer, B. (Dresden, Tech. U.) ; Karavicheva, T. (Moscow, INR) ; Koenig, I. (Darmstadt, GSI) ; Koenig, W. (Darmstadt, GSI) ; Kolb, B.W. (Darmstadt, GSI) ; Korcyl, G. (Jagiellonian U.) ; Kornakov, G. (Darmstadt, Tech. Hochsch.) ; Kotte, R. (Forschungszentrum Dresden Rossendorf) ; Krasa, A. (Rez, Nucl. Phys. Inst.) ; Krizek, F. (Rez, Nucl. Phys. Inst.) ; Krucken, R. (Munich, Tech. U.) ; Kuc, H. (Orsay) ; Kuhn, W. (Giessen U.) ; Kugler, A. (Rez, Nucl. Phys. Inst.) ; Kunz, T. (Munich, Tech. U.) ; Kurepin, A. (Moscow, INR) ; Ladygin, V. (Dubna, JINR) ; Lalik, R. (COSM, Hampton) ; Lapidus, K. (COSM, Hampton) ; Lebedev, A. (Moscow, ITEP) ; Lopes, L. (LIP, Coimbra) ; Lorenz, M. (Utrecht U.) ; Maier, L. (Munich, Tech. U.) ; Mangiarotti, A. (LIP, Coimbra) ; Markert, J. (Frankfurt U.) ; Metag, V. (Giessen U.) ; Michel, J. (Frankfurt U.) ; Mihaylov, D. (COSM, Hampton) ; Muntz, C. (Frankfurt U.) ; Munzer, R. (COSM, Hampton) ; Naumann, L. (Forschungszentrum Dresden Rossendorf) ; Pachmayer, Y.C. (Frankfurt U.) ; Palka, M. (Jagiellonian U.) ; Parpottas, Y. (UC, Irvine) ; Pechenov, V. (Darmstadt, GSI) ; Pechenova, O. (Frankfurt U.) ; Pietraszko, J. (Darmstadt, GSI) ; Przygoda, W. (Jagiellonian U.) ; Ramstein, B. (Orsay) ; Reshetin, A. (Moscow, INR) ; Rustamov, A. (Frankfurt U.) ; Sadovsky, A. (Moscow, INR) ; Salabura, P. (Jagiellonian U.) ; Schmah, A. (LBL, Berkeley) ; Schwab, E. (Darmstadt, GSI) ; Siebenson, J. (COSM, Hampton) ; Sobolev, Yu. G. (Rez, Nucl. Phys. Inst.) ; Spataro, S. (INFN, Turin) ; Spruck, B. (Giessen U.) ; Strobele, H. (Frankfurt U.) ; Stroth, J. (Darmstadt, GSI) ; Sturm, C. (Darmstadt, GSI) ; Svoboda, O. (Rez, Nucl. Phys. Inst.) ; Tarantola, A. (Frankfurt U.) ; Teilab, K. (Frankfurt U.) ; Tlusty, P. (Rez, Nucl. Phys. Inst.) ; Traxler, M. (Darmstadt, GSI) ; Tsertos, H. (Cyprus U.) ; Vasiliev, T. (Dubna, JINR) ; Wagner, V. (Rez, Nucl. Phys. Inst.) ; Weber, M. (Munich, Tech. U.) ; Wendisch, C. (Darmstadt, GSI) ; Wustenfeld, J. (Forschungszentrum Dresden Rossendorf) ; Yurevich, S. (Darmstadt, GSI) ; Zanevsky, Y. (Dubna, JINR)

Pages: 7

Abstract: We present results on the $K^{*}(892)^{+}$ production in proton-proton collision s at a beam energy of $E = 3.5$~GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon- nucleon reactions. The data are interpreted within a two-channel model that includes the 3-body production of $K^{*}(892)^{+}$ associated with the $\Lambda$- or $\Sigma$-hyperon. The relative contributions of both channels are estimated. Besides the total cross section $\sigma(p+p \to K^{*}(892)^{+} + X) = 9.5 \pm 0.9 ^{+1.1}_{-0.9} \ pm 0.7$~$\mu$b, that adds a new data point to the excitation function of the $K^{*}(892)^{+}$ production in the region of low excess energy, transverse momenta and angular spectra are extracted and compared with the predictions of the two-channel model. The spin characteristics of $K^{*}(892)^{+}$ are discussed as well in terms of the spin-alignment.

Web-Page: http://inspirehep.net/record/1372636/files/CorrSpectrum_SpinAlCosThetaK0S.png; http://inspirehep.net/record/1372636/files/CorrSpectrum_CosThetaKstarCM.png; http://inspirehep.net/record/1372636/files/CorrSpectrum_pT.png; http://inspirehep.net/record/1372636/files/cs_180515.png; http://inspirehep.net/record/1372636/files/CorrSpectrum_PKstarCM.png; http://inspirehep.net/record/1372636/files/IM_K0S.png; http://inspirehep.net/record/1372636/files/MDCdEdx_Exp_140417.png; http://inspirehep.net/record/1372636/files/UncorrSpectrum_pT_3channels.png; http://inspirehep.net/record/1372636/files/IMS_pTcut429.png; http://inspirehep.net/record/1372636/files/arXiv:1505.06184.pdf

Note: 7 pages, 9 figures, 1 table

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