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Title: Measurement of non-photonic electrons in p+p collisions at sNN = 200 GeV with reduced detector material in STAR

Abstract

In this paper, we present our analysis of mid rapidity non-photonic electron (NPE) production at pT > 0.2 GeV/c in p+p collisions at √sNN = 200 GeV. The data set is ∼78 M TOF-triggered events taken from RHIC year 2008runs. Through the measurement of the e/π ratio, we find that the photonic background electrons from γ conversions are reduced by about a factor of 10 compared with those in STAR previous runs due to the absence of inner tracking detectors and the supporting materials. The dramatic increase of the signal-to-background ratio will allow us to improve the precision on extracting the charm cross section via its semi-leptonic decays to electrons.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
970497
Report Number(s):
BNL-90340-2009-JA
Journal ID: ISSN 0954-3899; R&D Project: PO-003; KB-02-02-012; TRN: US1000787
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Journal of Physics G - Nuclear and Particle Physics
Additional Journal Information:
Journal Volume: 36; Conference: Strangeness in Quark Matter 2008 (SQM2008); Beijing, China; 20081005 through 20081010; Journal ID: ISSN 0954-3899
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; CROSS SECTIONS; ELECTRONS; PARTICLE RAPIDITY; PRODUCTION; QUARK MATTER; STRANGENESS; Human Performance, Human Factors Engineering, Ergonomics, Control Rooms, Plant Operations, Design Methods; relativistic heavy ion collider

Citation Formats

Jin, F, Hallman, T, and et al. Measurement of non-photonic electrons in p+p collisions at sNN = 200 GeV with reduced detector material in STAR. United States: N. p., 2009. Web.
Jin, F, Hallman, T, & et al. Measurement of non-photonic electrons in p+p collisions at sNN = 200 GeV with reduced detector material in STAR. United States.
Jin, F, Hallman, T, and et al. Wed . "Measurement of non-photonic electrons in p+p collisions at sNN = 200 GeV with reduced detector material in STAR". United States.
@article{osti_970497,
title = {Measurement of non-photonic electrons in p+p collisions at sNN = 200 GeV with reduced detector material in STAR},
author = {Jin, F and Hallman, T and et al.},
abstractNote = {In this paper, we present our analysis of mid rapidity non-photonic electron (NPE) production at pT > 0.2 GeV/c in p+p collisions at √sNN = 200 GeV. The data set is ∼78 M TOF-triggered events taken from RHIC year 2008runs. Through the measurement of the e/π ratio, we find that the photonic background electrons from γ conversions are reduced by about a factor of 10 compared with those in STAR previous runs due to the absence of inner tracking detectors and the supporting materials. The dramatic increase of the signal-to-background ratio will allow us to improve the precision on extracting the charm cross section via its semi-leptonic decays to electrons.},
doi = {},
journal = {Journal of Physics G - Nuclear and Particle Physics},
issn = {0954-3899},
number = ,
volume = 36,
place = {United States},
year = {2009},
month = {5}
}