Probing jet quenching via the correlation of groomed jet substructure observables in Pb−Pb and pp collisions

@misc{abdallah2026probing,
  title = {{Probing jet quenching via the correlation of groomed jet substructure observables in Pb$-$Pb and pp collisions}},
  author = {Dana Ali Hassan Abdallah and Ibrahim Jaser Abualrob and Shreyasi Acharya and Kshitij Agarwal and Gianluca Aglieri Rinella and Luca Aglietta and Neelima Agrawal and Zubayer Ahammed and Shakeel Ahmad and Zulkaida Akbar and Valentina Akishina and Mohammad Al-Turany and Bruno Alessandro and Abdul Rahman Alfarasyi and Jose Ruben Alfaro Molina and Bushra Ali and Andrea Alici and Johan Alme and Giacomo Alocco and Torsten Alt and Igor Altsybeev and Cristian Andrei and Nicodemos Andreou and Anton Andronic and Massimo Angeletti and Venelin Anguelov and Federico Antinori and Pietro Antonioli and Nicole Apadula and Harald Appelshaeuser and Silvia Arcelli and Roberta Arnaldi and Ionut Cristian Arsene and Mesut Arslandok and Muhammad Uzair Aslam and Andre Augustinus and Ralf Peter Averbeck and Mohd Danish Azmi and Byungyun Kong and Hitoshi Baba and Akash Raj John Babu and Angela Badala and Joonsuk Bae and Yunseul Bae and Yongwook Baek and Xiaozhi Bai and Raphaelle Marie Bailhache and Yoshini Bailung and Renu Bala and Alberto Baldisseri and Bartosz Balis and Shubham Bangalia and Koushik Barai and Veronika Barbasova and Francesco Barile and Luca Barioglio and Maria Barlou and Banajit Barman and Gergely Gabor Barnafoldi and Lee Stuart Barnby},
  howpublished = {HAL},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.39515},
  eprint = {2609.39515},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05781935v1},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Probing jet quenching via the correlation of groomed jet substructure observables in Pb−Pb and pp collisions
AU  - Dana Ali Hassan Abdallah
AU  - Ibrahim Jaser Abualrob
AU  - Shreyasi Acharya
AU  - Kshitij Agarwal
AU  - Gianluca Aglieri Rinella
AU  - Luca Aglietta
AU  - Neelima Agrawal
AU  - Zubayer Ahammed
AU  - Shakeel Ahmad
AU  - Zulkaida Akbar
AU  - Valentina Akishina
AU  - Mohammad Al-Turany
AU  - Bruno Alessandro
AU  - Abdul Rahman Alfarasyi
AU  - Jose Ruben Alfaro Molina
AU  - Bushra Ali
AU  - Andrea Alici
AU  - Johan Alme
AU  - Giacomo Alocco
AU  - Torsten Alt
AU  - Igor Altsybeev
AU  - Cristian Andrei
AU  - Nicodemos Andreou
AU  - Anton Andronic
AU  - Massimo Angeletti
AU  - Venelin Anguelov
AU  - Federico Antinori
AU  - Pietro Antonioli
AU  - Nicole Apadula
AU  - Harald Appelshaeuser
AU  - Silvia Arcelli
AU  - Roberta Arnaldi
AU  - Ionut Cristian Arsene
AU  - Mesut Arslandok
AU  - Muhammad Uzair Aslam
AU  - Andre Augustinus
AU  - Ralf Peter Averbeck
AU  - Mohd Danish Azmi
AU  - Byungyun Kong
AU  - Hitoshi Baba
AU  - Akash Raj John Babu
AU  - Angela Badala
AU  - Joonsuk Bae
AU  - Yunseul Bae
AU  - Yongwook Baek
AU  - Xiaozhi Bai
AU  - Raphaelle Marie Bailhache
AU  - Yoshini Bailung
AU  - Renu Bala
AU  - Alberto Baldisseri
AU  - Bartosz Balis
AU  - Shubham Bangalia
AU  - Koushik Barai
AU  - Veronika Barbasova
AU  - Francesco Barile
AU  - Luca Barioglio
AU  - Maria Barlou
AU  - Banajit Barman
AU  - Gergely Gabor Barnafoldi
AU  - Lee Stuart Barnby
PY  - 2026
DA  - 2026/09/30
PB  - HAL
DO  - 10.48550/arxiv.2609.39515
UR  - https://hal.science/hal-05781935v1
AB  - A measurement of the correlation between the splitting angle θ_g and the momentum-sharing fraction z_g of the first hard splitting in a parton shower in pp collisions and 0−10% central Pb−Pb collisions at √(s_NN) = 5 TeV with the ALICE detector is reported. Charged-particle jets are reconstructed using the anti-k_T algorithm with a jet resolution parameter R = 0.2, in the transverse-momentum range 60 ≤ p_T,ch jet < 80 GeV/c. The Soft Drop grooming algorithm is used to identify the first splitting in the parton shower. Jets observed in Pb−Pb collisions are narrower than in pp collisions. This effect is more pronounced for balanced than for unbalanced jets. No significant modification of the momentum-sharing fraction is observed for jets with small opening angles. In contrast, there is a hint that jets with a large opening angle may be less balanced in transverse momentum in Pb−Pb collisions compared to pp collisions. The correlations between θ_g and z_g are well described in pp collisions by PYTHIA 8 and POWHEG while HERWIG shows too few jets with large opening angle. In Pb−Pb collisions the measurement is compared to a variety of models. The measurement is insensitive to the different implementations of medium response. Inclusion of elastic scatterings, as implemented in the HYBRID model is preferred to describe the unbalanced jets with large θ_g in Pb−Pb collisions. The balanced jets, however, are less sensitive to elastic scatterings.
ER  -