<div>
<div>
<div>
<div>
<p>Due to the large masses, heavy quarks are produced early and experience the full evolution
of the medium. The comparison between the nuclear modification factors of heavy flavor and
light hadrons can provide insights into the expected flavor dependence of parton energy loss.
The relative coalescence contribution to baryon production is expected to be more significant
than that to mesons because of their larger number of constituent quarks. In particular,
models involving coalescence of charm and light-flavor quarks predict a large enhancement
in the Λ+c /D0 production ratio in the heavy ion collisions relative to pp collisions and also
predict that this enhancement has a strong pT dependence.
</p><p>This dissertation presents the production of inclusive (prompt) Λ+c baryons in proton-
proton and lead-lead collisions at 5.02 TeV in 2015 (2017 and 2018) with CMS detector
at the CERN LHC. These two analyses show that Λ+c baryons production is found to
be suppressed in heavy ion collisions. This suppression is consistent with the suppression
observed in D0 meson measurements. The Λ+c /D0 production ratios in pp collisions are
consistent with a model obtained by adding color reconnection in hadronization to PYTHIA8.
Also the Λ+c /D0 production ratios in pp collisions are consistent with the model that includes
enhanced contribution from the decay of excited charm baryons and the model includes the
effect of fragmentation and coalescence. There is a hint of an enhancement in the Λ+c /D0
production ratio in PbPb collisions in the pT range of 6–12.5 GeV/c compared to pp collisions.
The Λ+c /D0 ratios in pp and PbPb collisions for pT > 12.5 GeV/c are found to be consistent
with each other.
</p>
</div>
</div>
</div>
</div>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/17007568 |
| Date | 22 November 2021 |
| Creators | Rui Xiao (11697166) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/PRODUCTION_OF_LAMBDA_C_BARYONS_IN_PROTON-PROTON_AND_LEAD-LEAD_COLLISIONS_AT_5_02_TEV_WITH_CMS/17007568 |
Page generated in 0.0015 seconds