Ω- Yields in pp Events at √s = 13 TeV Using the ALICE Detector
(2021) FYSK02 20202Particle and nuclear physics
Department of Physics
- Abstract
- Ω- is a baryon which is rarely produced in proton collisions. The theoretical models for how these Ω- appear are yet not fully developed. Previous studies have shown that the experimental data did not agree with the models since more Ω- particles appeared in the proton collisions than expected. In the LHC (Large Hadron Collider) outside Geneva, protons are accelerated to high energies and collided. The products from the collision are analyzed in the ALICE (A Large Ion Collider Experiment). The Ω- yield is extracted by multiple methods, including side-band subtractions and peak fitting. When plotting the ratio of Ω- yields divided by the reconstructed charged multiplicity, the ratio shows an increase in Ω- yields much faster than the... (More)
- Ω- is a baryon which is rarely produced in proton collisions. The theoretical models for how these Ω- appear are yet not fully developed. Previous studies have shown that the experimental data did not agree with the models since more Ω- particles appeared in the proton collisions than expected. In the LHC (Large Hadron Collider) outside Geneva, protons are accelerated to high energies and collided. The products from the collision are analyzed in the ALICE (A Large Ion Collider Experiment). The Ω- yield is extracted by multiple methods, including side-band subtractions and peak fitting. When plotting the ratio of Ω- yields divided by the reconstructed charged multiplicity, the ratio shows an increase in Ω- yields much faster than the increase in average charged multiplicity. (Less)
- Popular Abstract (Swedish)
- Vid partikelacceleratorn LHC pågår ett flertal experiment. Ett av dem är ALICE-experimentet där atomkärnor kollideras. När atomkärnor slås sönder bildas ett plasma av kvarkar och gluoner. I detta kvark–gluonplasma skapas bland annat nya exotiska kvarkar. En av dessa mer exotiska kvarkar är särkvarken. När tre stycken särkvarkar förenas så bildar de en Omega-partikel. Omegan sönderfaller i sin tur till andra partiklar, som i slutändan övergår till vanlig materia. Tidigare studier har visat att fler Omega bildades, än förväntat vid kollisioner mellan atomkärnor av väte. Detta arbete analyserar ny data från ALICE-experimentet tagna vid högre energinivåer än tidigare. Resultatet liknar det som observerats tidigare vid lägre energier.... (More)
- Vid partikelacceleratorn LHC pågår ett flertal experiment. Ett av dem är ALICE-experimentet där atomkärnor kollideras. När atomkärnor slås sönder bildas ett plasma av kvarkar och gluoner. I detta kvark–gluonplasma skapas bland annat nya exotiska kvarkar. En av dessa mer exotiska kvarkar är särkvarken. När tre stycken särkvarkar förenas så bildar de en Omega-partikel. Omegan sönderfaller i sin tur till andra partiklar, som i slutändan övergår till vanlig materia. Tidigare studier har visat att fler Omega bildades, än förväntat vid kollisioner mellan atomkärnor av väte. Detta arbete analyserar ny data från ALICE-experimentet tagna vid högre energinivåer än tidigare. Resultatet liknar det som observerats tidigare vid lägre energier. Förhållandet mellan Omega och laddade partiklar ökar desto mer laddade partiklar som observeras. Ökningen av Omega visar att de teoretiska modellerna behöver modifieras. Djupare analyser av kollisionerna behövs också för att förstå den bakomliggande fysiken. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9038025
- author
- Pålsson, Henrik LU
- supervisor
- organization
- course
- FYSK02 20202
- year
- 2021
- type
- M2 - Bachelor Degree
- subject
- keywords
- LHC, ALICE, strangeness enhancement, charged multiplicity
- language
- English
- id
- 9038025
- date added to LUP
- 2021-01-26 09:19:16
- date last changed
- 2021-01-26 09:19:16
@misc{9038025, abstract = {{Ω- is a baryon which is rarely produced in proton collisions. The theoretical models for how these Ω- appear are yet not fully developed. Previous studies have shown that the experimental data did not agree with the models since more Ω- particles appeared in the proton collisions than expected. In the LHC (Large Hadron Collider) outside Geneva, protons are accelerated to high energies and collided. The products from the collision are analyzed in the ALICE (A Large Ion Collider Experiment). The Ω- yield is extracted by multiple methods, including side-band subtractions and peak fitting. When plotting the ratio of Ω- yields divided by the reconstructed charged multiplicity, the ratio shows an increase in Ω- yields much faster than the increase in average charged multiplicity.}}, author = {{Pålsson, Henrik}}, language = {{eng}}, note = {{Student Paper}}, title = {{Ω- Yields in pp Events at √s = 13 TeV Using the ALICE Detector}}, year = {{2021}}, }