Mon·Mar 2, 2015Monday·March 2, 2015

1. 01*

   Pion production in p+p interactions and Be+Be collisions at the CERN SPS energies

   Antoni Aduszkiewicz (for the NA61 Collaboration)🇵🇱

   Evidence for the onset of deconfinement in central Pb+Pb collisions was reported by NA49 in fixed target measurements at beam momentum 30A GeV/c. This observation motivated the NA61/SHINE program started in 2009 at the CERN SPS, which, in particular, aims to study properties of the onset of deconfinement by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus collisions. This contribution presents spectra of charged pions produced in p+p interactions and ${}^7$Be+${}^9$Be collisions at 20A-158A GeV/c beam momentum. The NA61/SHINE results are compared with the corresponding NA49 data from central Pb+Pb collisions at the same beam momenta per nucleon.

   nucl-exNucl.Part.Phys.Proc.(2016)·1 citation
2. 02*

   Energy dependence of hadron spectra and multiplicities in p+p interactions

   Szymon Puławski (for the NA61 Collaboration)🇵🇱

   The NA61/SHINE experiment at the CERN SPS aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. In order to reach these goals measurements of hadron production properties are performed in nucleus-nucleus, proton-proton and proton-nucleus interactions as a function of collision energy and size of the colliding nuclei. Inclusive spectra of identified hadrons in p+p interactions at the SPS energies are presented as a function of transverse momentum, transverse mass and rapidity. The results are compared with the world data and theoretical models.

   nucl-exPoS(2015)·19 citations
3. 03*

   Characterization of Silicon Photomultipliers for nEXO

   I. Ostrovskiy🇺🇸 · F. Retiere🇨🇦 · D. Auty🇺🇸 · J. Dalmasson🇺🇸 · T. Didberidze🇺🇸 · R. DeVoe🇺🇸 · G. Gratta🇺🇸 · L. Huth🇨🇦 · L. James🇨🇦 · L. Lupin-Jimenez🇺🇸 · N. Ohmert🇨🇦 · A. Piepke🇺🇸

   Silicon Photomultipliers (SiPMs) are attractive candidates for light detectors for next generation liquid xenon double-beta decay experiments, like nEXO. In this paper we discuss the requirements that the SiPMs must satisfy in order to be suitable for nEXO and similar experiments, describe the two test setups operated by the nEXO collaboration, and present the results of characterization of SiPMs from several vendors. In particular, we find that the photon detection efficiency at the peak of xenon scintillation light emission (175-178 nm) approaches the nEXO requirements for tested FBK and Hamamatsu devices. Additionally, the nEXO collaboration performed radioassay of several grams of bare FBK devices using neutron activation analysis, indicating levels of 40K, 232Th, and 238U of the order of <0.15, (6.9e10-4 - 1.3e10-2), and <0.11 mBq/kg, respectively.

   ↳ physics.ins-dethep-exnucl-exIEEE Trans.Nucl.Sci.(2015)·41 citations
4. 04*

   Hit time and hit position reconstruction in the J-PET detector based on a library of averaged model signals

   P. Moskal🇵🇱 · N.G.Sharma🇵🇱 · M.Silarski🇵🇱 · T. Bednarski🇵🇱 · P. Białas🇵🇱 · J. Bułka🇵🇱 · E. Czerwiński🇵🇱 · A. Gajos🇵🇱 · D. Kamińska🇵🇱 · L. Kapłon🇵🇱 · A. Kochanowski🇵🇱 · G. Korcyl🇵🇱 and 19 other authors

   In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depends strongly on the position where particle hit the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals stored in a library for a set of well-defined positions along the scintillator. Preliminary results of validation of the introduced method with experimental data obtained by means of the double strip prototype of the J-PET detector are presented.

   ↳ physics.ins-detnucl-exActa Phys.Polon.A(2015)·14 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.