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SHINE experiment
Available online at www.sciencedirect.com
Nuclear Physics B (Proc. Suppl.) 229–232 (2012) 470 www.elsevier.com/locate/npbps
Particle production cross-sections by 30 GeV protons on Carbon at the NA61/SHINE experiment Tomasz Jan Palczewskia , Magdalena Zofia Posiadalab , for the NA61/SHINE Collaboration a Soltan
Institute for Nuclear Studies, Poland, Warsaw, Hoza 69 of Warsaw, Poland, Warsaw, Hoza 69
b University
Abstract One of the physics goals of the NA61/SHINE experiment [1] is to perform new hadron production measurements in proton-Carbon interactions at 30 GeV. This data will be used to constrain the prediction of neutrino fluxes for the T2K experiment at J-PARC [2]. For precise predictions of the T2K neutrino beam parameters the measurements were performed on two different types of targets: thin carbon target and the replica of the actual target of the T2K experiment [3]. The preliminary results on π+ and π− inelastic cross sections at thin carbon target from 2007 pilot run are presented. Keywords: Pion cross-sections, T2K neutrino flux predictions, NA61/SHINE In the NA61/SHINE experiment particle identification was possible using energy loss measurements ( dE dx ) in active volume of the TPCs and time-of-flight information from ToF detectors [4]. In order to obtain pion yields three different analyses were developed: energy loss measurements, combined energy loss and time-offlight measurements, and analysis of negatively charged particles referred to as the h− . The three different approaches give consistent results within quoted systematic errors for the negative pion case (see Fig. 1). The continuity is observed for the positive pion analysis. This work was supported in part by the Polish Ministry of Science and Higher Education (PBP 2878/B/H03/2010/38, PBS 667/N-CERN/2010, N N202 1267 36, DWM/57/T2K/2007) [1] N. Antoniou et al. [NA61/SHINE Collaboration], CERN-SPSC2007- 019, (2007) [2] Y. Hayato et al. [T2K Collaboration], T2K at J-PARC, Nucl. Phys. Proc. Suppl. 143, (2005) [3] L.S. Esposito, [NA61/SHINE Collaboration] , NA61 data for T2K flux calculations, poster at Neutrino 2010. [4] J. Argyriades, [NA61/SHINE Collaboration] , NA61 experiment and applications for neutrino fluxes and cosmic rays, poster at Neutrino 2010.
0920-5632/$ – see front matter © 2012 Elsevier B.V. All rights reserved. doi:10.1016/j.nuclphysbps.2012.09.107
Figure 1: Differential inclusive inelastic cross sections for π− (top four panels) and π+ (bottom four panels) versus momentum in different θ angle intervals. Results from dE/dx (red) and dE/dx+ToF (green) and h− (black) analyses. A 20% systematic error bound is presented.
Nuclear Physics B (Proc. Suppl.) 229–232 (2012) 470 www.elsevier.com/locate/npbps
Particle production cross-sections by 30 GeV protons on Carbon at the NA61/SHINE experiment Tomasz Jan Palczewskia , Magdalena Zofia Posiadalab , for the NA61/SHINE Collaboration a Soltan
Institute for Nuclear Studies, Poland, Warsaw, Hoza 69 of Warsaw, Poland, Warsaw, Hoza 69
b University
Abstract One of the physics goals of the NA61/SHINE experiment [1] is to perform new hadron production measurements in proton-Carbon interactions at 30 GeV. This data will be used to constrain the prediction of neutrino fluxes for the T2K experiment at J-PARC [2]. For precise predictions of the T2K neutrino beam parameters the measurements were performed on two different types of targets: thin carbon target and the replica of the actual target of the T2K experiment [3]. The preliminary results on π+ and π− inelastic cross sections at thin carbon target from 2007 pilot run are presented. Keywords: Pion cross-sections, T2K neutrino flux predictions, NA61/SHINE In the NA61/SHINE experiment particle identification was possible using energy loss measurements ( dE dx ) in active volume of the TPCs and time-of-flight information from ToF detectors [4]. In order to obtain pion yields three different analyses were developed: energy loss measurements, combined energy loss and time-offlight measurements, and analysis of negatively charged particles referred to as the h− . The three different approaches give consistent results within quoted systematic errors for the negative pion case (see Fig. 1). The continuity is observed for the positive pion analysis. This work was supported in part by the Polish Ministry of Science and Higher Education (PBP 2878/B/H03/2010/38, PBS 667/N-CERN/2010, N N202 1267 36, DWM/57/T2K/2007) [1] N. Antoniou et al. [NA61/SHINE Collaboration], CERN-SPSC2007- 019, (2007) [2] Y. Hayato et al. [T2K Collaboration], T2K at J-PARC, Nucl. Phys. Proc. Suppl. 143, (2005) [3] L.S. Esposito, [NA61/SHINE Collaboration] , NA61 data for T2K flux calculations, poster at Neutrino 2010. [4] J. Argyriades, [NA61/SHINE Collaboration] , NA61 experiment and applications for neutrino fluxes and cosmic rays, poster at Neutrino 2010.
0920-5632/$ – see front matter © 2012 Elsevier B.V. All rights reserved. doi:10.1016/j.nuclphysbps.2012.09.107
Figure 1: Differential inclusive inelastic cross sections for π− (top four panels) and π+ (bottom four panels) versus momentum in different θ angle intervals. Results from dE/dx (red) and dE/dx+ToF (green) and h− (black) analyses. A 20% systematic error bound is presented.