Particle Physics
Research
Current lines of research
Signals of new physics at colliders and other experiments
The phenomenology of long-lived particles (LLP) at colliders
The connection of LLP collider signatures with dark matter
LLP collider tests of models for neutrino mass generation
Current research projects as Principal Investigator
Searching for new physics at the lifetime frontier (2022-2025)- Funded by ANID FONDECYT Iniciación 11220237
Phenomenology of long-lived particles and portals to new physics (2019-2022) - Funded by ANID FONDECYT Postdoctoral 3190051
Other research appointments/projects
Theory co-convenor, LHC-LLP Working Group, CERN (May 2022-May 2024)
Young researcher at Millennium Institute for Subatomic Physics at the High Energy Frontier (SAPHIR)
Sponsor of Dr. Ivania Maturana Ávila, ANID FONDECYT Postdoctoral, Shining light on dark matter models (2021-2023)
Co-Investigator of Prof. Dr. Juan Carlos Helo, ANID FONDECYT Regular, Long-lived particles and neutrino mass models (2020-2024)
Research students
I supervised, along with Prof. Juan Carlos Helo, graduate student F. Hernandez in his Master thesis in Physics at Universidad de La Serena, Chile (2020-2022)
I supervised, along with Prof. Marco A. Diaz, student L. Parada in his Bachelor thesis in Physics at Pontificia Universidad Católica de Chile (2020)
Selected publications
All can be found on inSPIRE and arXiv
Reinterpretation of searches for long-lived particles from meson decays, R. Beltrán, G. Cottin, M. Hirsch, A. Titov and Z. S. Wang, JHEP 05 (2023) 031
Long-lived heavy neutral leptons with a displaced shower signature at CMS, G. Cottin, J.C. Helo, M. Hirsch, C. Peña, C. Wang, Si Xie, JHEP 02, 011 (2023)
Long-lived heavy neutral leptons from mesons in effective field theory, R. Beltrán, G. Cottin, J. C. Helo, M. Hirsch, A. Titov and Z. S. Wang, JHEP 01, 015 (2023)
Searching for light neutralinos with a displaced vertex at the LHC, G. Cottin, J. C. Helo, N. Neill, F. Hernández-Pinto and Z. S. Wang, JHEP 10, 095(2022)
Displaced Neutrino Jets at the LHeC, G. Cottin, O. Fischer, S. Mandal, M. Mitra and R. Padhan, JHEP 06, 168(2022)
Long-lived heavy neutral leptons at the LHC: four-fermion single-NR operators, R. Beltrán, G. Cottin, J. C. Helo, M. Hirsch, A. Titov and Z. S. Wang, JHEP 01, 044(2022)
Revisiting the scotogenic model with scalar dark matter, Ivania M. Ávila, G. Cottin, Marco A. Díaz, J.Phys.G 49, 6 065001 (2022)
Searching for light long-lived neutralinos at Super-Kamiokande, P. Candia, G. Cottin, A. Méndez, V. Muñoz, Phys.Rev.D 104, 055024 (2021)
Heavy neutral leptons in effective field theory and the high-luminosity LHC, G. Cottin, J. C. Helo, M. Hirsch, A. Titov and Z. S. Wang, JHEP 09, 039 (2021)
Collider Probes of Real Triplet Scalar Dark Matter, Cheng-Wei Chiang, Giovanna Cottin, Yong Du, Kaori Fuyuto and Michael Ramsey-Musolf, JHEP 01, 198 (2021)
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider, LLP community, J.Phys.G 47, 9 090501 (2020)
Displaced vertices as probes of sterile neutrino mixing at the LHC, G. Cottin, J. C. Helo, M. Hirsch, Phys. Rev. D 98,035012 (2018)
Reconstructing particle masses in events with displaced vertices, G. Cottin, JHEP 03, 137 (2018)
Searches for light sterile neutrinos with multitrack displaced vertices, G. Cottin, J.C. Helo and M. Hirsch, Phys. Rev. D 97, 055025 (2018)
Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector, ATLAS Collaboration, Phys. Rev. D 92, 072004 (2015)
Recent talks
A Long-lived Collaboration, HirschFest, IFIC Valencia, January 2024
The need for long-lived particle searches at the LHC and beyond, NYU Abu Dhabi Physics Seminar, October 11 2023
Long-lived Heavy Neutral Leptons at the LHC, NYU Abu Dhabi, HEP Group Seminar, October 10th 2023
UTFSM Seminar, Reinterpretation of Long-Lived Particle Searches at the LHC, Chile, August 30, 2023
SAPHIR Seminar, Example LLP models and Reinterpretations, August 7, 2023
11th Large Hadron Collider Physics Conference, LLP Overview: Theory Perspective, Belgrade, Serbia, May 22, 2023
SAPHIR ARM 2023, Long-lived particle phenomenology, La Serena, Chile, January 2023
8th International Conference on High Energy Physics in the LHC Era, Valparaíso, Chile, Long-lived Heavy Neutral Leptons at the LHC, January 13, 2023
IFIC Seminar, The need for long-lived particle searches at the LHC and beyond, December 13, 2022
Searching for long-lived particles at the LHC and beyond: Twelve workshop of the LLP Community, Long-Lived Heavy Neutral Leptons with a displaced shower signature, June 3, 2022
Searching for long-lived particles at the LHC and beyond: Tenth workshop of the LLP Community, Long-lived HNLs in NRSMEFT, November 12, 2021
Large Hadron Collider Physics Conference (LHCPC 2021), Searching for long-lived particles and Heavy Neutral Leptons: Theory perspective, June 7, 2021
HEP Weekly Seminar, Exotic Collider Probes of dark matter, Universidad Técnica Federico Santa María, Online, January 2021
La Parte y el Todo: Workshop on Advanced topics on High Energy Physics and Gravitation, Long-lived Particles at the Large Hadron Collider, Online, Chile, January 2021
New proposals to search for Long-lived Sterile Neutrinos at the LHC, Gravitículas Seminar, Pontifica Universidad Católica de Chile, Online, November 2020
Long-lived Sterile Neutrinos at the LHC, ACFI Seminar, University of Massachusetts Amherst, Online, October 2020
Heavy Neutral Leptons at HL-LHC with the CMS Muon Spectrometer, Dark Sectors and Light Long-Lived Particles, SNOWMASS Cross Frontier Meeting, Online, July 2020
Particle dark matter with exotic signatures at the LHC, Gravitículas Seminar, Pontificia Universidad Católica de Chile, June 25, 2020
Long-Lived Particles at the Large Hadron Collider, Colloquio Física UC Valparaiso, June 3, 2020 (video in Spanish here)
Searching for the Unknown at the Large Hadron Collider, FIC UAI, Data Science Seminar, May 14, 2020
Where may the new physics be hiding at the Large Hadron Collider? USACH Physics Seminar, April 29, 2020
Where may the new physics be hiding at the Large Hadron Collider? UAI Physics and Astronomy Seminar, April 15, 2020 (video in Spanish here)
Conferences, workshops, schools and research visits
Research Visit, Instituto de Física Corpuscular (IFIC), Valencia, Spain in the context of the HirschFest, January 2024
Research Visit at New York University Abu Dhabi, October 2023
Lecturer at the Third Winter school Topics on Graviticulas, for postgraduate students on High Energy Physics in Chile, August 2023
Lecturer at the Chilean School in Theoretical High Energy Physics (Escuela de Física Teórica de Altas Energía), at Universidad de Concepción, Chile, May 2023
Discussion Leader at the 11th CERN Latin-American School of High-Energy Physics (CLASHEP2023), March 2023, San Esteban, Valparaíso, Chile
Research Visit, University of La Serena, Chile, January 2023
Research Visit, Universidad Técnica Federico Santa María, January 2022. See https://www.institutosaphir.cl/reunion-fisica-teorica-saphir-utfsm/
Searching for long-lived particles at the LHC and beyond: Tenth workshop of the LLP Community, November 2021
Research Visit, University of La Serena, Chile, October 2021
Large Hadron Collider Physics Conference (LHCPC 2021), June 2021
La Parte y el Todo (The Part and the Whole): Workshop on Advanced topics on High Energy Physics and Gravitation, Afunalhue (Online), Chile, January 2021
Searching for long-lived particles at the LHC : Eight workshop of the LHC LLP Community, Online Worldwide, November 2020
Searching for long-lived particles at the LHC : Seventh workshop of the LHC LLP Community, Online Worldwide, May 2020
Research Visit, University of La Serena, Chile, December 2019
Searching for long-lived particles at the LHC : Sixth workshop of the LHC LLP Community, Ghent, November 2019
Long-lived particles and the third generation, Edinburgh, November 2019
Searching for long-lived particles at the LHC : Fifth workshop of the LHC LLP Community (remote)
Research Visit, University of La Serena, Chile, October 2018
ICHEP 2018, Seoul, Korea, July 2018
Research Visit, Korean Institute of Advanced Study (KIAS), Seoul, Korea, July 2018
Workshop on New Physics with Displaced Vertices, NCTS, Hsinchu, Taiwan, June 2018
Taiwan-Korea joint Workshop on Particle Physics, NCU, Zhongli, Taiwan, May, 2018
Searching for long-lived particles at the LHC: Third workshop of the LHC LLP Community, May 2018