Unleashing the full power of LHCb to probe Stealth New Physics Alonso Álvarez, G. Ramos, Maria We thank the participants in the \Stealth Physics at LHCb" workshop, held in Santiago de Compostela in February 2020 [333], for many fruitful discussions and for triggering many ideas that were developed here. We also thank the LHC Long-Lived Particle community, and the LPCC LHC Long-lived Particle and Dark Matter working groups for fostering and nurturing the interest in the ideas here discussed. We kindly acknowledge Vladimir Gligorov, Stephen Farry and Niels Tuning for kindly reading and providing comments to this document. This work has been supported by MINECO (Spain) through the Ramón y Cajal program RYC-2016- 20073 and by XuntaGAL under the ED431F 2018/01 project. It has also received nancial support from XuntaGAL (Centro singular de investigación de Galicia accreditation 2019-2022), by European Union ERDF, by the \María de Maeztu" Units of Excellence program MDM-2016-0692 and the Spanish Research State Agency, and by the Generalitat Valenciana (Spain) through the plan GenT program (CIDEGENT/2019/068). In this paper, we describe the potential of the LHCb experiment to detect Stealth physics. This refers to dynamics beyond the Standard Model that would elude searches that focus on energetic objects or precision measurements of known processes. Stealth signatures include long-lived particles and light resonances that are produced very rarely or together with overwhelming backgrounds. We will discuss why LHCb is equipped to discover this kind of physics at the Large Hadron Collider and provide examples of well-motivated theoretical models that can be probed with great detail at the experiment. 2022-03-28T12:00:34Z 2022-03-28T12:00:34Z 2022-02-08 info:eu-repo/semantics/article Published version: M Borsato... [et al.], 2022 Rep. Prog. Phys. 85 024201. DOI: [10.1088/1361-6633/ac4649] http://hdl.handle.net/10481/73851 10.1088/1361-6633/ac4649 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Institute of Physics