Evidence for the dead-cone effect in bottom quark initiated jets produced in proton-proton collisions at √s = 13 TeV

@misc{gevorgyan2026evidence,
  title = {{Evidence for the dead-cone effect in bottom quark initiated jets produced in proton-proton collisions at $\sqrts$ = 13 TeV}},
  author = {Arzunik Gevorgyan and Aram Hayrapetyan and Vladimir Makarenko and Armen Tumasyan and Wolfgang Adam and Lisa Benato and Thomas Bergauer and Marko Dragicevic and Stefan Gundacker and Ali Kaan Guven and Priya Sajid Hussain and Manfred Jeitler and Natascha Krammer and Ang Li and Dietrich Liko and Mark Nicholas Matthewman and Jochen Schieck and Robert Schoefbeck and Maryam Shooshtari and Mangesh Sonawane and Niels van den Bossche and Wolfgang Waltenberger and Claudia Wulz and Tahys Janssen and Daniel Ocampo Henao and Thomas van Laer and Pierre van Mechelen and Donya Ahmadi and Jas Bierkens and Nordin Breugelmans and Soumya Dansana and Alexandre de Moor and Martin Delcourt and Stef Duponcheel and Chirayu Gupta and Felix Johannes Heyen and Yanwen Hong and Kai Kang and Pavlo Kashko and Steven Lowette and Inna Makarenko and Saranya Nandakumar and Jeremi Niedziela and Stefaan Tavernier and Michael Tytgat and Gerrit van Onsem and Senne van Putte and Tiepolo Wybouw and Aya Beshr and Bugra Bilin and Franco Caviglia Roman and Barbara Clerbaux and Aloke Kumar Das and Isabelle de Bruyn and Gilles de Lentdecker and Eliott Ducarme and Hugues Evard and Laurent Favart and Ilia Kalaitzidou and Ali Khalilzadeh},
  howpublished = {HAL},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.29412},
  eprint = {2608.29412},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05741416v1},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Evidence for the dead-cone effect in bottom quark initiated jets produced in proton-proton collisions at √s = 13 TeV
AU  - Arzunik Gevorgyan
AU  - Aram Hayrapetyan
AU  - Vladimir Makarenko
AU  - Armen Tumasyan
AU  - Wolfgang Adam
AU  - Lisa Benato
AU  - Thomas Bergauer
AU  - Marko Dragicevic
AU  - Stefan Gundacker
AU  - Ali Kaan Guven
AU  - Priya Sajid Hussain
AU  - Manfred Jeitler
AU  - Natascha Krammer
AU  - Ang Li
AU  - Dietrich Liko
AU  - Mark Nicholas Matthewman
AU  - Jochen Schieck
AU  - Robert Schoefbeck
AU  - Maryam Shooshtari
AU  - Mangesh Sonawane
AU  - Niels van den Bossche
AU  - Wolfgang Waltenberger
AU  - Claudia Wulz
AU  - Tahys Janssen
AU  - Daniel Ocampo Henao
AU  - Thomas van Laer
AU  - Pierre van Mechelen
AU  - Donya Ahmadi
AU  - Jas Bierkens
AU  - Nordin Breugelmans
AU  - Soumya Dansana
AU  - Alexandre de Moor
AU  - Martin Delcourt
AU  - Stef Duponcheel
AU  - Chirayu Gupta
AU  - Felix Johannes Heyen
AU  - Yanwen Hong
AU  - Kai Kang
AU  - Pavlo Kashko
AU  - Steven Lowette
AU  - Inna Makarenko
AU  - Saranya Nandakumar
AU  - Jeremi Niedziela
AU  - Stefaan Tavernier
AU  - Michael Tytgat
AU  - Gerrit van Onsem
AU  - Senne van Putte
AU  - Tiepolo Wybouw
AU  - Aya Beshr
AU  - Bugra Bilin
AU  - Franco Caviglia Roman
AU  - Barbara Clerbaux
AU  - Aloke Kumar Das
AU  - Isabelle de Bruyn
AU  - Gilles de Lentdecker
AU  - Eliott Ducarme
AU  - Hugues Evard
AU  - Laurent Favart
AU  - Ilia Kalaitzidou
AU  - Ali Khalilzadeh
PY  - 2026
DA  - 2026/08/29
PB  - HAL
DO  - 10.48550/arxiv.2608.29412
UR  - https://hal.science/hal-05741416v1
AB  - The suppression of collinear gluon emissions from a massive quark, or the ``dead-cone effect,'' is the primary manifestation of quark mass effects in parton showers. A proton-proton collision data set recorded by the CMS experiment at √s = 13 TeV with an integrated luminosity of 59.8 fb^−1 is analyzed. A differential measurement is presented of the emission density of bottom quark jets, studied as a function of the angular separation between iteratively declustered subjets. The measurement is performed in bottom quark initiated jets with transverse momenta between 40 and 200 GeV originating from top quark pair production. Compared to data, a parton shower Monte Carlo model that includes the dead-cone effect is favored, while a model without the dead-cone effect is disfavored with a significance of 4.3 standard deviations.
ER  -