@article{3031755,
    title = "Jet fragmentation transverse momentum distributions in pp and p-Pb
collisions at root s, root s(NN)=5.02 TeV",
    author = "Acharya, S. and Adamova, D. and Adler, A. and Adolfsson, J. and Rinella, and G. Aglieri and Agnello, M. and Agrawal, N. and Ahammed, Z. and Ahmad, S. and and Ahn, S. U. and Akbar, Z. and Akindinov, A. and Al-Turany, M. and and Albuquerque, D. S. D. and Aleksandrov, D. and Alessandro, B. and and Alfanda, H. M. and Alfaro Molina, R. and Ali, B. and Ali, Y. and Alici, and A. and Alizadehvandchali, N. and Alkin, A. and Alme, J. and Alt, T. and and Altenkamper, L. and Altsybeev, I and Anaam, M. N. and Andrei, C. and and Andreou, D. and Andronic, A. and Anguelov, V and Antinori, F. and and Antonioli, P. and Apadula, N. and Aphecetche, L. and Appelshauser, H. and and Arcelli, S. and Arnaldi, R. and Arratia, M. and Arsene, I. C. and and Arslandok, M. and Augustinus, A. and Averbeck, R. and Aziz, S. and Azmi, and M. D. and Badala, A. and Baek, Y. 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    journal = "Journal of High Energy Physics",
    year = "2021",
    number = "9",
    publisher = "Springer-Verlag",
    issn = "1126-6708, 1029-8479",
    doi = "10.1007/JHEP09(2021)211",
    keywords = "Heavy Ion Experiments",
    abstract = "Jet fragmentation transverse momentum (j(T)) distributions are measured
in proton-proton (pp) and proton-lead (p-Pb) collisions at root s(NN) =
5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed
with the ALICE tracking detectors and electromagnetic calorimeter using
the anti-k(T) algorithm with resolution parameter R = 0.4 in the
pseudorapidity range vertical bar eta vertical bar < 0.25. The j(T)
values are calculated for charged particles inside a fixed cone with a
radius R = 0.4 around the reconstructed jet axis. The measured j(T)
distributions are compared with a variety of parton-shower models.
Herwig and PYTHIA 8 based models describe the data well for the higher
j(T) region, while they underestimate the lower j(T) region. The j(T)
distributions are further characterised by fitting them with a function
composed of an inverse gamma function for higher j(T) values (called the
“wide component”), related to the perturbative component of the
fragmentation process, and with a Gaussian for lower j(T) values (called
the “narrow component”), predominantly connected to the
hadronisation process. The width of the Gaussian has only a weak
dependence on jet transverse momentum, while that of the inverse gamma
function increases with increasing jet transverse momentum. For the
narrow component, the measured trends are successfully described by all
models except for Herwig. For the wide component, Herwig and PYTHIA 8
based models slightly underestimate the data for the higher jet
transverse momentum region. These measurements set constraints on models
of jet fragmentation and hadronisation."
}