Measurement of the open charm cross-section in \sqrt{s_{\rm NN}} = 200 GeV Cu+Cu collisions at the STAR experiment at RHIC

2008 ◽  
Vol 35 (10) ◽  
pp. 104112 ◽  
Author(s):  
A Shabetai ◽  
Keyword(s):  
Cross Section ◽  
Open Charm ◽  
200 Gev ◽  
Star Experiment

A STUDY ON THE INTRINSIC TIME RESOLUTION OF THE MRPC USED IN THE STAR-TOF

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2476-2483 ◽  
Author(s):  
◽  
MING SHAO ◽  
LIANG LI
Keyword(s):  
Time Resolution ◽  
Incident Angle ◽  
Signal Amplitude ◽  
Test Results ◽  
Beam Test ◽  
Intrinsic Time ◽  
200 Gev ◽  
Star Experiment ◽  
Calibration Study ◽  
Using Data

Time-Of-Flight (TOF) based on Multi-gap Resistive Plate Chamber (MRPC) detectors have been successfully operating at the STAR experiment since 2003.2,3 The MRPC time resolution is however found to be significantly worse2 (80-90 ps) than that previously obtained in beam test (60 ps).4 In order to fully understand MRPC working principles and operating requirements, an extensive calibration study is performed using data collected by STAR in 200 GeV Au + Au collisions in 2004. The relation between MRPC timing, signal amplitude, incident angle and momentum are discussed. Contributions from tracking properties of STAR-TPC are also studied by simulation. The intrinsic time resolution of the MRPCs used in STAR-TOF, after taking all factors into consideration, is found to be in good agreement with beam test results.

scholarly journals Open charm studies at Belle

2019 ◽  
Vol 212 ◽  
pp. 09003
Author(s):  
Valentina Zhukova
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Open Charm ◽  
Mass Energy ◽  
Initial State ◽  
Belle Detector ◽  
Section Measurement ◽  
Angular Analysis ◽  
State Radiation ◽  
Radiation Technique

We present the new results of measurements of the exlusive cross sections of the e+ e− annihilation to charmed meson pairs as a function of √ ceneter-of-mass energy from the open charm threashold up to $ \sqrt s = {\rm{6 GeV}} $ using initial state radiation technique. The analysis is based on a data sample collected by the Belle detector with an integrated luminosity of 951 fb−1. The accuracy of the cross section measurement is increased by a factor of 2 in comparison with the first Belle study. We have performed the first angular analysis + −→ D*± D*∓ of the $ {e^{\rm{ + }}}{e^ - } \to {D^{* \pm }}{D^{* \mp }} $ process and decomposed this exclusive cross section into three components corresponding to the different D* helicities.

EXPLANATION OF THE DATA ON $\Gamma (Z^0\to b\bar b) /\Gamma (Z^0\to {\rm hadrons})$ AND THE INCLUSIVE b→sγ BRANCHING RATIO

1996 ◽  
Vol 11 (12) ◽  
pp. 1011-1022 ◽  
Author(s):  
E.H. LEMKE
Keyword(s):  
Cross Section ◽  
Transverse Energy ◽  
Branching Ratio ◽  
Diboson Production ◽  
Spinor Space ◽  
200 Gev ◽  
Inclusive Jet ◽  
Basic Spinor ◽  
Spinor Symmetry

Calculations show that the data on the Z0 hadronic branching ratio fraction to [Formula: see text] at the Z0 pole as well as the inclusive b→sγ branching ratio can be explained by an anomalous (γ-Z0)WW coupling having ∆κ=−1 and λ=0. Such a vertex was derived from a representation in spinor space some time ago. The agreement is analyzed and possible implication of that basic spinor symmetry are described. Finally, the recent data on diboson production and their interpretation are examined critically. The used and shortly presented electroweak unification scheme of “structureless compositeness” provides two natural explanations of the increase of the inclusive jet cross-section above 200 GeV jet transverse energy observed at FNAL recently.

scholarly journals Open charm yields in 200 GeV p+p and d+Au collisions at RHIC

2004 ◽  
Vol 30 (8) ◽  
pp. S1197-S1200 ◽  
Author(s):  
Lijuan Ruan ◽  
(for the STAR Collaboration)
Keyword(s):  
Open Charm ◽  
200 Gev

scholarly journals Cross section and double helicity asymmetry forηmesons and their comparison toπ0production inp+pcollisions ats=200  GeV

2011 ◽  
Vol 83 (3) ◽  
Author(s):  
A. Adare ◽  
S. Afanasiev ◽  
C. Aidala ◽  
N. N. Ajitanand ◽  
Y. Akiba ◽  
...  
Keyword(s):  
Cross Section ◽  
200 Gev
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