Charged pion spectra at high pT in pp collisions at (roten ur) S = 900 GeV, measured by the ALICE TPC
Author
Summary, in English
The ALICE Time Projection Chamber (TPC) is used for tracking and measuring momentum
and specific energy loss, dE/dx, of charged particles produced in hadron collisions at the
LHC. This Master’s dissertation describes the statistical identification of charged hadrons (pions,
kaons and protons) on the relativistic rise (transverse momentum pT > 3 GeV/c) of the
dE/dx curve of the ALICE TPC. Two complementary methods are evaluated and compared.
An effect of track cluster charge falling below the threshold of the read-out electronics is found
to influence the species separation in dE/dx, and methods to recover the separation are suggested
and discussed. Charged pion fractions and invariant charged pion yields in pp collisions
at
p
s = 900 GeV are presented as a function of pT, for pseudorapidity jhj < 0.8 and
3 pT 10 GeV/c.
and specific energy loss, dE/dx, of charged particles produced in hadron collisions at the
LHC. This Master’s dissertation describes the statistical identification of charged hadrons (pions,
kaons and protons) on the relativistic rise (transverse momentum pT > 3 GeV/c) of the
dE/dx curve of the ALICE TPC. Two complementary methods are evaluated and compared.
An effect of track cluster charge falling below the threshold of the read-out electronics is found
to influence the species separation in dE/dx, and methods to recover the separation are suggested
and discussed. Charged pion fractions and invariant charged pion yields in pp collisions
at
p
s = 900 GeV are presented as a function of pT, for pseudorapidity jhj < 0.8 and
3 pT 10 GeV/c.
Publishing year
2011
Language
English
Full text
Document type
Student publication for Master's degree (two years)
Topic
- Physics and Astronomy
Supervisor
- Peter Christiansen