Publication: QUARK ENERGY LOSS MEASUREMENT WITH THE CLAS DETECTOR
Date
2021
Authors
ILHA MACHADO, GABRIELA HAMILTON
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Abstract
In this analysis, we studied quark energy loss for positive pions produced in DIS events.
The analysis used data from experiments carried out during the run period EG2 in Hall
B of Jefferson Lab, Virginia. The experiments used a 5.014 GeV electron beam and
studied the nuclear targets deuterium, carbon, iron and lead.
This phenomenon has been studied indirectly in various types of scattering experiments
such as heavy-ion collisions, DIS, among others, measuring different kinds of
hadrons, such as pions and kaons.
By looking at the production of ⇡+ from two different targets we can obtain information
about quark energy loss by comparing the curves of the energy spectra. Assuming
that the energy distributions from the different targets have approximately the same
behaviour, the goal of the study is to measure the size of the horizontal shift between
the distributions that would correspond to a shift in quark energy.
To extract quark energy loss, the method proposed is to shift the energy spectrum
from the solid target by some chosen amount and compare this new distribution
with the original energy spectrum from the deuterium target. To compare the curves
the Kolmogorov-Smirnov statistical test was used, that gives the probability that both
curves follow the same underlying distribution. If the described steps are repeated for
a sufficient number of different shifts in energy a probability curve is obtained and the
average energy loss can be estimated.
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Keywords
PERDIDA DE ENERGIA , HADRONIZACIÓN , JLAB , CLAS