The ALICE Collaboration reports a search for jet quenching efects in highmultiplicity (HM) proton-proton collisions at √s = 13 TeV, using the semi-inclusive azimuthaldiference distribution ∆φ of charged-particle jets recoiling from a high transverse momentum (high-pT,trig) trigger hadron. Jet quenching may broaden the ∆φ distribution measured in HM events compared to that in minimum bias (MB) events. The measurement employs a pT,trig-diferential observable for data-driven suppression of the contribution of multiple partonic interactions, which is the dominant background. While azimuthal broadening is indeed observed in HM compared to MB events, similar broadening for HM events is observed for simulations based on the PYTHIA 8 Monte Carlo generator, which does not incorporate jet quenching. Detailed analysis of these data and simulations show that the azimuthal broadening is due to bias of the HM selection towards events with multiple jets in the fnal state. The identifcation of this bias has implications for all jet quenching searches where selection is made on the event activity.

Null, N., Acharya, S., Adamová, D., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2024). Search for jet quenching efects in high-multiplicity pp collisions at √s = 13 TeV via di-jet acoplanarity. JOURNAL OF HIGH ENERGY PHYSICS, 2024(5), 1-31 [10.1007/jhep05(2024)229].

Search for jet quenching efects in high-multiplicity pp collisions at √s = 13 TeV via di-jet acoplanarity

Alici, A.;Arcelli, S.;Bellini, F.;Carnesecchi, F.;Colocci, M.;Ercolessi, F.;Jacazio, N.;Malfattore, G.;Rubini, N.;Scioli, G.;Strazzi, S.;
2024

Abstract

The ALICE Collaboration reports a search for jet quenching efects in highmultiplicity (HM) proton-proton collisions at √s = 13 TeV, using the semi-inclusive azimuthaldiference distribution ∆φ of charged-particle jets recoiling from a high transverse momentum (high-pT,trig) trigger hadron. Jet quenching may broaden the ∆φ distribution measured in HM events compared to that in minimum bias (MB) events. The measurement employs a pT,trig-diferential observable for data-driven suppression of the contribution of multiple partonic interactions, which is the dominant background. While azimuthal broadening is indeed observed in HM compared to MB events, similar broadening for HM events is observed for simulations based on the PYTHIA 8 Monte Carlo generator, which does not incorporate jet quenching. Detailed analysis of these data and simulations show that the azimuthal broadening is due to bias of the HM selection towards events with multiple jets in the fnal state. The identifcation of this bias has implications for all jet quenching searches where selection is made on the event activity.
2024
Null, N., Acharya, S., Adamová, D., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2024). Search for jet quenching efects in high-multiplicity pp collisions at √s = 13 TeV via di-jet acoplanarity. JOURNAL OF HIGH ENERGY PHYSICS, 2024(5), 1-31 [10.1007/jhep05(2024)229].
Null, Null; Acharya, S.; Adamová, D.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I.; Akindinov, A.; Al-...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1008452
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