Speaker
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Hadronisation, a dynamic process where coloured objects transition into colourless bound states, is an important phenomenon tied to the understanding of strong interactions. Particularly, this process has a different behaviour in nuclear environments in comparison to vacuum, and this difference can be used to know more about the dynamics of the hadronising objects [1].
The hadronic transverse momentum broadening is an observable used in the study of the hadronisation process in nuclear environments. This observable can be related to the space-time development of a highly energetic quark traversing the nuclear medium before it transitions into a bound state [2, 3, 4]. The preliminary results for the first multidimensional experimental measurement of the transverse momentum broadening for positive pions, produced by lepton-nucleon deep inelastic scattering, in carbon, iron, and lead targets at Jefferson Lab’s CLAS detector with a 5.014GeV unpolarized electron beam, will be shown. In order to have a consistent identification framework to later extract hadronisation-related parameters, the particle identification scheme developed during the charged pions’multiplicity ratio analysis measurements is used to define this data sample [5].
[1] A. Accardi et al. “Hadron production in deep inelastic lepton nucleus scattering”. In: Nucl.Phys. B 484 (1997), pp. 265–282. doi:10.1016/S0375-9474(03)00670-5. arXiv:nucl-th/0211011.
[2] R. Baier et al. “Radiative energy loss and p(T) broadening of high-energy partons in nuclei”. In:Nucl.Phys.A 720 (2003) 131-156. doi: 10.1016/S0550-3213(96)00581-0. arXiv: hep-ph/9608322.
[3] B. Z. Kopeliovich et al. “Nuclear hadronization: Within or without?”In: Nucl. Phys. A 740 (2004), pp. 211–245. doi: 10.1016/j.nuclphysa.2004.04.110. arXiv: hep-ph/0311220.
[4] S. Domdey et al. “Transverse Momentum Broadening in Semi-inclusive DIS on Nuclei”. In: Nucl. Phys. A825 (2009), pp. 200–211. doi:10.1016/j.nuclphysa.2009.04.009. arXiv: 0812.2838 [hep-ph].
[5] S. Moran et al. “Measurement of charged-pion production in deep-inelastic scattering off nuclei with the CLAS detector”. In: Phys. Rev. C 105.1 (2022), p. 015201. doi: 10.1103/PhysRevC.105.015201. arXiv:2109.09951 [nucl-ex].1