منابع مشابه
Transverse Momentum Dependence of Cumulative Pions
In the framework of the recently proposed QCD based parton model for the cumulative phenomena in the interactions with nuclei the dependence of the cumulative pion production rates on the transverse momentum K⊥ is studied. The mean value of K⊥ is found to grow with x in the cumulative region. The obtained results are in agreement with the available experimental data. ∗This work is supported by ...
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Results on transverse mass spectra of neutral pions measured at central rapidity are presented for impact parameter selected 158·A GeV Pb + Pb, and Pb + Nb collisions. The distributions cover the range 0.5 GeV/c ≤ mT − m0 ≤ 4 GeV/c . The change of the spectral shape with centrality is studied in detail. In going from peripheral to medium central collisions there is a nuclear enhancement increas...
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We give evidence that the production of DCC’s during a nonequilibrium phase transition can lead to an anomalous transverse distribution of secondary pions when compared to a more conventional boost invariant hydrodynamic flow in local thermal equilibrium. Our results pertain to the linear σ model,treated in leading order in largeN , in a boost invariant approximation. We also show that the inte...
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We present the analysis of data taken in the years 2002-2004 with the 27.56 GeV positron beam of the HERA storage ring at DESY and the internal transversely polarised hydrogen fixed target of the HERMES experiment. Events with a scattered positron and a produced pion are selected. Exclusive production of single pions, e+p → e+′nπ+, is ensured by requiring the missing mass in the event to be equ...
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The early stages of a neutrino factory are critical to fulfill physics requirements in the final muon storage ring. The transverse collection of pions behind the target is therefore a crucial feature for which different options exist. In this article, two collection systems using either quadrupoles or a transition solenoid between the target and the downstream channel are studied. The transitio...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 2000
ISSN: 0168-9002
DOI: 10.1016/s0168-9002(00)00405-8