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Khandai, P. K.
- Meson Spectra in p + p Collisions at LHC
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Authors
Affiliations
1 Department of Physics, Banaras Hindu University, Varanasi, 221005, IN
2 Department of High Energy Physics, Tata Institute of Fundamental Research, Mumbai 400005, IN
3 Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400084, IN
4 School of Physics, Sambalpur University, Jyoti Vihar, 768019, IN
1 Department of Physics, Banaras Hindu University, Varanasi, 221005, IN
2 Department of High Energy Physics, Tata Institute of Fundamental Research, Mumbai 400005, IN
3 Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400084, IN
4 School of Physics, Sambalpur University, Jyoti Vihar, 768019, IN
Source
Indian Journal of Science and Technology, Vol 6, No 9 (2013), Pagination: 5277-5280Abstract
The p + p (proton + proton) collisions are important to understand particle production mechanism in partonic collisions and are also used as baseline for heavy ion collisions. We present systematic study of meson spectra in p + p collisions at LHC energies (√s = 0.9, 2.76 and 7.0 TeV). We also studied the transverse mass (m<SUB>T</SUB>) spectra of pion and kaon for p + p collisions at all above mentioned energies. In an earlier study [1], it was shown that all the mesons produced in p + p and d + Au collisions at √s<SUB>NN</SUB> = 200 GeV follow m<SUB>T</SUB> scaling while in Au + Au collisions at same energy the mesons with strange and charm quark contents do not follow m<SUB>T</SUB> scaling which can be attributed to medium modifications. Here we fit all pion spectra with Hagedorn distribution and extract all the output parameters from the fitting. Then we fit kaon spectra using m<SUB>T</SUB> scaling with the help of those extracted fitting parameters along with a normalizing factor. We observed that m<SUB>T</SUB> scaling in case of kaon is valid in p + p collisions at LHC energies. The normalizing factor of kaon with respect to pion (K/π) is almost constant in all energies . This study is important for the observation of strangeness enhancement in heavy ion collisions, which is an important probe of quark gluon plasma (QGP). It is also used as a baseline for the study of medium modifications in heavy ion collisions. Kaon spectra provides a unique opportunity to identify new flavor and CP violating interactions beyond the Standard Model (SM).Keywords
LHC, Hagedorn Function, Meson SpectraFull Text
References
- Khandai P K, Shukla P et al. (2011). Meson spectra and mT scaling in p + p , d + Au, and Au + Au collisions at √sNN=200 GeV, Physical Review C, vol 84(5).
- Armesto N et al. (LHC) (2008). Heavy ion collisions at the LHC- last call for predictions, Journal of Physics G, vol 35, No. 5.
- Chatrchyan S et al. (CMS Collaboration) (2012). Study of the inclusive production of charged pions, kaons, and protons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV, The European Physical Journal C, vol 72, 2164.
- Fries R, Greco V et al. (2008). Coalescence models for hadron formation from quark gluon plasma, Annual Review of Nuclear and Particle Science, vol 58, 177–205, DOI: 10.1146/annurev.nucl.58.110707.171134.
- Albrecht R et al. (WA80 Collaboration) (1995). Production of Eta-Mesons in 200 AGeV/c S+S and S+Au Reactions, Physics Letter B, vol 361, 14–20.
- Hagedorn R (1984). Multiplicities, pT distributions and the expected hadron to quark-gluon phase transition, La Rivista del Nuovo Cimento, vol 6(10), 1–50.
- Adare A et al. (PHENIX Collaboration) (2010). Enhanced production of direct photons in Au + Au collisions at √sNN = 200GeV and implications for the initial temperature, Physical Review Letters, vol 104(13).
- Adare A et al. (PHENIX Collaboration) (2010). Heavy quark production in p + p and energy loss and flow of heavy quarks in Au + Au collisions at √sNN = 200 GeV, Physical Review C, vol 84(4).
- Adare A et al. (PHENIX Collaboration) (2011). Measurement of neutral mesons in p+p collisions at √sNN =200GeV and scaling properties of hadron production, Physical Review D, vol 83(5).