Search for heavy long-lived charged particles with large ionization energy loss in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

A bstract A search for heavy, long-lived, charged particles with large ionization energy loss within the silicon tracker of the CMS experiment is presented. A data set of proton-proton collisions at a center of mass energy at $$ \sqrt{s} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 TeV, collected in 2017 and 2018 at the CERN LHC, corresponding to an integrated luminosity of 101 fb − 1 , is used in this analysis. Two different approaches for the search are taken. A new method exploits the independence of the silicon pixel and strips measurements, while the second method improves on previous techniques using ionization to determine a mass selection. No significant excess of events above the background expectation is observed. The results are interpreted in the context of the pair production of supersymmetric particles, namely gluinos, top squarks, and tau sleptons, and of the Drell-Yan pair production of fourth generation ( τ ′) leptons with an electric charge equal to or twice the absolute value of the electron charge ( e ). An interpretation of a Z’ boson decaying to two τ ′ leptons with an electric charge equal to 2 e is presented for the first time. The 95% confidence upper limits on the production cross section are extracted for each of these hypothetical particles.

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Journal
Journal of High Energy Physics
Published
2025-04-15
DOI
https://doi.org/10.1007/jhep04(2025)109
Citations
2
Primary Topic
Particle physics theoretical and experimental studies
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article
Field-Weighted Citation Impact
3.74

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article

Search for heavy long-lived charged particles with large ionization energy loss in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

A. Santoro, T. Reis, B. Kailasapathy, M. A. Ciocci et al.
2 citations
Journal of High Energy Physics
Particle physics theoretical and experimental studies
3.74
article

Search for heavy long-lived charged particles with large ionization energy loss in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

A. Santoro, T. Reis, B. Kailasapathy, M. A. Ciocci, S. Polikarpov, A. Vilela Pereira, Ismail Okan Atakisi, A. Vagnerini, K. Rabbertz, S. Mukherjee, P. G. Kosmoglou Kioseoglou, U. Goerlach, J. Alexander, John D. Lawrence, J. Choi, G. Cummings, V. Brigljević, S. Bansal, M. M. A. Gadallah, J. Lidrych, S. Tuo, Ryan Mccarthy, Andrew Hart, A. Awais, P. Azzurri, A. Gurrola, L. Uplegger, S. Dittmer, A. Nikitenko, B. Hacışahinoğlu, D. Nguyen, Guo-Ming Chen, V. D’Amante, Lovisa Rygaard, S. Yang, James Natoli, Justin Anguiano, I. Lomidze, B. Blumenfeld, N. Varelas, W. L. Aldá Júnior, N. Venkatasubramanian, P. Zehetner, V. Wachirapusitanand, M. Osherson, H. Oğul, Aashay Arora, Frank Jensen, Sabrina Giorgetti, A. Lapertosa, G. Sorrentino, O. Kukral, Y. Xiang, M. Horzela, A. Harilal, A. Mecca, Farouk Mokhtar, R. Wolf, P. Vanlaer, K. Shchelina, S. H. Kim, Soumik Chandra, A. Tarabini, B. Akgün, M. Stamenkovic, Vincenzo Innocente, B. M. Joshi, M. Presilla, S. Tekten, A. Garcia-Bellido, G. Milella, A. 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Abstract

A bstract A search for heavy, long-lived, charged particles with large ionization energy loss within the silicon tracker of the CMS experiment is presented. A data set of proton-proton collisions at a center of mass energy at $$ \sqrt{s} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 TeV, collected in 2017 and 2018 at the CERN LHC, corresponding to an integrated luminosity of 101 fb − 1 , is used in this analysis. Two different approaches for the search are taken. A new method exploits the independence of the silicon pixel and strips measurements, while the second method improves on previous techniques using ionization to determine a mass selection. No significant excess of events above the background expectation is observed. The results are interpreted in the context of the pair production of supersymmetric particles, namely gluinos, top squarks, and tau sleptons, and of the Drell-Yan pair production of fourth generation ( τ ′) leptons with an electric charge equal to or twice the absolute value of the electron charge ( e ). An interpretation of a Z’ boson decaying to two τ ′ leptons with an electric charge equal to 2 e is presented for the first time. The 95% confidence upper limits on the production cross section are extracted for each of these hypothetical particles.

Journal of High Energy PhysicsVol. 2025(4)
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Particle physics theoretical and experimental studies
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