Discovering Partonic Rescattering in Light Nucleus Collisions
Huss, Alexander; Kurkela, Eero Aleksi; Mazeliauskas, Aleksas; Paatelainen, Risto; van der Schee, Wilke; Wiedemann, Urs Achim
Peer reviewed, Journal article
Published version
Permanent lenke
https://hdl.handle.net/11250/2978470Utgivelsesdato
2021-05Metadata
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Originalversjon
Huss, A., Kurkela, A., Mazeliauskas, A., Paatelainen, R., van der Schee, W., Achim, U. (2021) Discovering Partonic Rescattering in Light Nucleus Collisions. Physical Review Letters, 126, 192301 10.1103/PhysRevLett.126.192301Sammendrag
We demonstrate that oxygen-oxygen collisions at the LHC provide unprecedented sensitivity to parton energy loss in a system whose size is comparable to those created in very peripheral heavy-ion collisions. With leading and next-to-leading order calculations of nuclear modification factors, we show that the baseline in the absence of partonic rescattering is known with up to 2% theoretical accuracy in inclusive oxygen-oxygen collisions. Surprisingly, a Z-boson normalized nuclear modification factor does not lead to higher theoretical accuracy within current uncertainties of nuclear parton distribution functions. We study a broad range of parton energy loss models and we find that the expected signal of partonic rescattering can be disentangled from the baseline by measuring charged hadron spectra in the range 20 GeV < pT < 100 GeV.