Production of ω mesons in pp collisions at s=7TeV.
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| Title: | Production of ω mesons in pp collisions at s=7TeV. |
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| Authors: | Acharya, S.1 (AUTHOR), Adamová, D.2 (AUTHOR), Adler, A.3 (AUTHOR), Adolfsson, J.4 (AUTHOR), Aggarwal, M. M.5 (AUTHOR), Agha, S.6 (AUTHOR), Aglieri Rinella, G.7 (AUTHOR), Agnello, M.8 (AUTHOR), Agrawal, N.9,10 (AUTHOR), Ahammed, Z.1 (AUTHOR), Ahmad, S.11 (AUTHOR), Ahn, S. U.12 (AUTHOR), Akbar, Z.13 (AUTHOR), Akindinov, A.14 (AUTHOR), Al-Turany, M.15 (AUTHOR), Alam, S. N.16 (AUTHOR), Albuquerque, D. S. D.17 (AUTHOR), Aleksandrov, D.18 (AUTHOR), Alessandro, B.19 (AUTHOR), Alfanda, H. M.20 (AUTHOR) |
| Source: | European Physical Journal C -- Particles & Fields. Dec2020, Vol. 80 Issue 12, p1-81. 81p. |
| Abstract: | The invariant differential cross section of inclusive ω (782) meson production at midrapidity ( | y | < 0.5 ) in pp collisions at s = 7 TeV was measured with the ALICE detector at the LHC over a transverse momentum range of 2 < p T < 17 GeV / c . The ω meson was reconstructed via its ω → π + π - π 0 decay channel. The measured ω production cross section is compared to various calculations: PYTHIA 8.2 Monash 2013 describes the data, while PYTHIA 8.2 Tune 4C overestimates the data by about 50%. A recent NLO calculation, which includes a model describing the fragmentation of the whole vector-meson nonet, describes the data within uncertainties below 6 GeV / c , while it overestimates the data by up to 50% for higher p T . The ω / π 0 ratio is in agreement with previous measurements at lower collision energies and the PYTHIA calculations. In addition, the measurement is compatible with transverse mass scaling within the measured p T range and the ratio is constant with C ω / π 0 = 0.67 ± 0.03 (stat) ± 0.04 (sys) above a transverse momentum of 2.5 GeV / c . [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The invariant differential cross section of inclusive ω (782) meson production at midrapidity ( | y | < 0.5 ) in pp collisions at s = 7 TeV was measured with the ALICE detector at the LHC over a transverse momentum range of 2 < p T < 17 GeV / c . The ω meson was reconstructed via its ω → π + π - π 0 decay channel. The measured ω production cross section is compared to various calculations: PYTHIA 8.2 Monash 2013 describes the data, while PYTHIA 8.2 Tune 4C overestimates the data by about 50%. A recent NLO calculation, which includes a model describing the fragmentation of the whole vector-meson nonet, describes the data within uncertainties below 6 GeV / c , while it overestimates the data by up to 50% for higher p T . The ω / π 0 ratio is in agreement with previous measurements at lower collision energies and the PYTHIA calculations. In addition, the measurement is compatible with transverse mass scaling within the measured p T range and the ratio is constant with C ω / π 0 = 0.67 ± 0.03 (stat) ± 0.04 (sys) above a transverse momentum of 2.5 GeV / c . [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-020-08651-y |
