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arxiv: 2110.14675 · v1 · pith:JTVRYH2Anew · submitted 2021-10-27 · ✦ hep-ex · hep-ph· hep-th

Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider

Juliette Alimena , James Beacham , Freya Blekman , Adri\'an Casais Vidal , Xabier Cid Vidal , Matthew Citron , David Curtin , Albert De Roeck
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Nishita Desai Karri Folan Di Petrillo Yuri Gershtein Louis Henry Tova Holmes Brij Jashal Philip James Ilten Sascha Mehlhase Javier Montejo Berlingen Arantza Oyanguren Giovanni Punzi Murilo Santana Rangel Federico Leo Redi Lorenzo Sestini Emma Torro Carlos V\'azquez Sierra Maarten van Veghel Mike Williams Jos\'e Zurita Darin Acosta Christina Agapopoulou Sara Alderweireldt Artur Apresyan Aur\'elien Bailly-Reyre Carla Mar\'in Benito Alessandro Bertolin Lukas Calefice Daniel Hugo C\'ampora P\'erez Andrea Coccaro Sven Dildick Caterina Doglioni Sinead Farrington Jack Gargan Stefano Giagu Jason Gilmore Vladimir Gligorov Giulia Gonella Guillermo Hamity Arthur Hennequin Tao Huang Sergo Jindariani Daniel Johnson Georgia Karapostoli Aaron Kilgallon Gillian Kopp Martin Kwok Owen Long Jia Fu Low Steven Lowette Jingyu Luo Nik Menendez Titus Momb\"acher Paul Padley Victoria Parrish Cristi\'an Pe\~na Lorenzo Pica Vladimir Rekovic Suzanne Rosenzweig Alexei Safonov Jakob Salfeld-Nebgen Mar\'ia Spirop\'ulu Giulia Tuci Chris Tully Andrii Usachov David Vannerom Akanksha Vishwakarma Christina Wang Si Xie Efe Yi\u{g}itba\c{s}{\i} Estifa'a Zaid
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classification ✦ hep-ex hep-phhep-th
keywords triggersexperimentalideascollidercommunitydevelopmentduringexperiments
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Long-lived particles (LLPs) are highly motivated signals of physics Beyond the Standard Model (BSM) with great discovery potential and unique experimental challenges. The LLP search programme made great advances during Run 2 of the Large Hadron Collider (LHC), but many important regions of signal space remain unexplored. Dedicated triggers are crucial to improve the potential of LLP searches, and their development and expansion is necessary for the full exploitation of the new data. The public discussion of triggers has therefore been a relevant theme in the recent LLP literature, in the meetings of the LLP@LHC Community workshop and in the respective experiments. This paper documents the ideas collected during talks and discussions at these Workshops, benefiting as well from the ideas under development by the trigger community within the experimental collaborations. We summarise the theoretical motivations of various LLP scenarios leading to highly elusive signals, reviewing concrete ideas for triggers that could greatly extend the reach of the LHC experiments. We thus expect this document to encourage further thinking for both the phenomenological and experimental communities, as a stepping stone to further develop the LLP@LHC physics programme.

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