David Silvermyr
Senior lecturer
Soft-Dielectron Excess in Proton-Proton Collisions at s =13 TeV
Author
Summary, in English
A measurement of dielectron production in proton-proton (pp) collisions at s=13 TeV, recorded with the ALICE detector at the CERN LHC, is presented in this Letter. The data set was recorded with a reduced magnetic solenoid field. This enables the investigation of a kinematic domain at low dielectron (ee) invariant mass mee and pair transverse momentum pT,ee that was previously inaccessible at the LHC. The cross section for dielectron production is studied as a function of mee, pT,ee, and event multiplicity dNch/dη. The expected dielectron rate from hadron decays, called hadronic cocktail, utilizes a parametrization of the measured η/π0 ratio in pp and proton-nucleus collisions, assuming that this ratio shows no strong dependence on collision energy at low transverse momentum. Comparison of the measured dielectron yield to the hadronic cocktail at 0.15
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2021
Language
English
Publication/Series
Physical Review Letters
Volume
127
Issue
4
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Keywords
- Hadrons
- Collision energies
- Enhancement factor
- Experimental conditions
- Hadron-Hadron collisions
- Many-body approach
- Proton proton collisions
- Proton-nucleus collisions
- Strong dependences
- Nuclear reactions
Status
Published
ISBN/ISSN/Other
- ISSN: 0031-9007