Current position

Associate Professor (Public Servant) of Atomic, Molecular and Nuclear Physics
Department of Interdisciplinary Physics. Universidad Nacional de Educación a Distancia (UNED)
Avda. Esparta 9, Las Rozas de Madrid, E-28232, Spain

• Full member of the Joint Physics Analysis Center (JPAC)
• Full member of the Exotic Hadrons (ExoHad) Topical Collaboration
• Member of the Electron-Ion Collider User Group (EICUG) and institutional representative of UNED
• Member of the Physics Innovation Teaching Group (GIDF) at UNED (GID2016-25)
• Department representative at the Master in Advanced Physics Committee
• Department representative at the Degree in Physics Committee

Research interest

My work is focused on understanding the strong interaction and color confinement in the energy regime where the gluons and quarks are bound into hadrons. Most of my work is on amplitude analysis for hadron spectroscopy, specially on exotic states. I use state-of-the-art theory and analysis techniques to extract dynamical information from experimental data. In this way I can get a better understanding of the strong interaction dynamics that leads to hadron formation. In doing so, I use S-matrix theory, effective field theories, chiral perturbation theory, Regge physics, lattice field theory, machine learning and artificial intelligence. My full list of publications can be found in the Scientific databases section below.

Education

• 2006 PhD in Physics. Universidad Complutense de Madrid (UCM), Madrid, Spain. Title: Electromagnetic Production of Light Mesons. Supervisors: J. M. Udías and E. Moya de Guerra. Grade: "Sobresaliente Cum Laude'' (Maximum qualification with Honors) with ``Doctor Europeus'' Mention.
• 2003 Diploma de Estudios Avanzados (~MSc)  in Atomic and Nuclear Physics and Renewable Power. Universidad Complutense de Madrid (UCM), Madrid, Spain. Title: Pion production in nuclei. Supervisors: J. M. Udías and E. Moya de Guerra.
• 2001 Licentiate in Physics (Fundamental Physics). Universidad Complutense de Madrid (UCM), Madrid, Spain. Thesis: Study of the Strange Content of the Nucleon. Supervisor: J. M. Udías

Scientific databases

• ORCID: 0000-0001-8979-5660
• Google Scholar: AsSoUjEAAAAJ
• InSPIRE-HEP: C.Fernandez.Ramirez.1
• Web of Science: E-9213-2010
• SCOPUS: 13002934000
   

Mentoring

PhD:

• 2025 J. A. Silva Castro. PhD Thesis Supervised within the PhD in Science (Physics) at Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico. Title: Amplitude Analysis for Hadron Physics.

MSc:

• 2025 A. A. Souissi. Master Thesis Supervised within the Master in Advanced Physics at UNED. Title: Estudio de la naturaleza de las resonancias hadrónicas usndo redes neuronales.
• 2025 J. Cheng. Master Thesis Supervised within the Master in Advanced Physics at UNED. Title: Modelos de IA generativa aplicados a la generación de muestras sintéticas de piones.
• 2019 J. A. Silva Castro. Master Thesis Supervised within the Master in Science (Physics) at UNAM. Title: Regge phenomenology of N* and Delta* poles. "Alfonso Caso'' Medal to best Master Thesis in Science (Physics) of the 2019 generation.
• 2012 R. Moreno Ortega. Master Thesis Supervised within the Inter-University Master in Nuclear Physics at UCM. Title: Chaos in Hadrons. In collaboration with Laura Muñoz Muñoz (UCM).

BSc:

• 2025 M. N. García Rey. BSc Thesis Supervised within the Bachelor in Physics at UNED. Title: Fenómenos extremos del Universo y su relación con la nucleosíntesis de elementos pesados.
• 2024 J. Egea Carro. BSc Thesis Supervised within the Bachelor in Physics at UNED. Title: Estudio de la interacción protón-nanopartícula mediante el uso del método Monte Carlo. In collaboration with Nuria Fuster Martínez (IFIC-CSIC).
• 2024 L. Collado Rivera. BSc Thesis Supervised within the Bachelor in Physics at UNED. Title: Violación de la simetría CP y análisis de la física del quark top en el contexto del Modelo Estándar.
• 2023 A. Solano Fernández-Tostado. BSc Thesis Supervised within the Bachelor in Physics at UNED. Title: Física de partículas subatómicas: Estado actual de la investigación sobre neutrinos.
• 2023 S. Martínez Ventura. BSc Thesis Supervised within the Bachelor in Physics at UNAM. Title: Estudio de los polos de la matriz de dispersión en un modelo sencillo.

Other:

• 2018 S. Martínez Ventura (UNAM). Social Service mentor.

Organization of scientific events

• 2025 Workshop on Multi-Particle Reactions from the Standard Model: spectroscopy, precision tests and beyond. Berkeley CA, USA. July 28-August 1, 2025.  Member of the Organizing Committee.
• 2025 Multi-Particle Reactions - Summer School. Berkeley CA, USA. July 14-25, 2025. Member of the Organizing Committee.
• 2025 21st International Conference on Hadron Spectroscopy and Structure (HADRON 2025). Osaka, Japan. March 27-31, 2025.  Member of the International Advisory Committee (IAC).
• 2023 20th International Conference on Hadron Spectroscopy and Structure (HADRON 2023). Genoa, Italy. June 5-9, 2023. Member of the International Advisory Committee (IAC) and convener of the Analysis Tools session.
• 2021 International Workshop on Partial Wave Analyses and Advanced Tools for Hadron Spectroscopy (PWA12/ATHOS7). Bristol, UK. September 6-10, 2021. Convener of the session: Heavy mesons, baryons and exotics spectroscopy.
• 2021 19th International Conference on Hadron Spectroscopy and Structure  in memoriam Simon Eidelman (HADRON 2021). MexicoCity, Mexico. July 26-31, 2021. Co-chair of the Local Organizing Committee.
• 2021 32nd National Nuclear Physics Summer School (NNPSS 2021). Mexico City, Mexico. June 23-27, 2021.  Member of the Local Organizing Committee.
• 2021 10th International Workshop on Charm Physics (CHARM 2020). Mexico City, Mexico. May 17-21, 2021. Co-chair of the Local Organizing Committee.
• 2018 X Escuela Mexicana de Física Nuclear. Mexico City, Mexico. June 2018. Member of the Local Organizing Committee.
• 2017 2nd Workshop on Future Directions in Hadron Spectroscopy and Structure Analysis (FDSA2017). Mexico City, Mexico. November 7-11, 2017. Chair of the Local Organizing Committee.

Selected publications

Theoretical:

1. Coulomb Confinement in the Hamiltonian Limit, Phys. Rev. D 110, 094509  (2024)
2. Dynamics in Near-Threshold J/psi Photoproduction, Phys. Rev. D 108, 054018 (2023)
3. Deep Learning Exotic Hadrons, Phys. Rev. D 105, L091501 (2022)
4. pi- p -> eta(') pi- p in the Double-Regge Region, Eur. Phys. J. C 81, 647 (2021)
5. Interpretation of the LHCb Pc(4312)+ Signal, Phys. Rev. Lett. 123, 092001 (2019)
6. Determination of the Pole Position of the Lightest Hybrid Meson Candidate, Phys. Rev. Lett. 122, 042002 (2019)
7. Studying the Pc(4450) Resonance in J/psi Photoproduction off Protons, Phys. Rev. D 94, 034002 (2016)
8. Coupled-Channel Model for KN Scattering in the Resonant Region, Phys. Rev. D 93, 034029 (2016)
9. Upper Energy Limit of Heavy Baryon Chiral Perturbation Theory in Neutral Pion Photoproduction, Phys. Lett. B 724, 253 (2013)
10. Properties of Nucleon Resonances by Means of a Genetic Algorithm, Phys. Rev. C 77, 065212 (2008)
11. Effective Lagrangian Approach to Pion Photoproduction from the Nucleon, Ann. Phys (NY) 321, 1408 (2006)

Experimental:

1. Observation of Sizeable omega Contribution to chi_c1(3872) -> pi+ pi- J/psi Decays, Phys. Rev. D 108, L011103 (2023)
2. Observation of a Narrow Pentaquark  State, Pc(4312)+, and of Two-Peak Structure of the Pc(4450)+, Phys. Rev. Lett. 122, 222001 (2019)
3. Measurement of Transverse Target Polarization Observables in Threshold pi0 Photoproduction at MAMI, Phys. Lett. B 750,  252 (2015)
4. Accurate Test of Chiral Dynamics in the gamma p-> pi0 p Reaction, Phys. Rev. Lett.  111, 062004 (2013)
5. Measurements of the Electric Form Factor of the Neutron using the Reaction 3He(e,e'n)pp up to Q2=3.4 GeV2, Phys. Rev. Lett. 105, 262302 (2010)

Reviews:

1. Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab, Eur. Phys. J. A 60, 173 (2024)
2. Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report, Nucl. Phys. A 1026, 122447 (2022)
3. Novel Approaches in Hadron Spectroscopy, Progress in Particle and Nuclear Physics 127, 103981 (2022)
4. The Electron-ion Scattering Experiment ELISe at the International Facility for Antiproton and Ion Research (FAIR) - A Conceptual Design Study, Nucl. Instrum. Methods Phys. Res. A 637, 60 (2011)

Datasets:

1. polarized gamma p -> pi0 p, A2 and CB-TAPS collaborations.
2. polarized gamma p -> pi0 polarized p, Mainz-A2 collaboration
3. J/psi p subchannel for pentaquarks, LHCb collaboration

Open Software:

1. Dynamics in Near-Threshold J/psi Photoproduction, Zenodo 8302620 (2023)
2. Charmonia Plot repository
3. Nuclear and Particle Physics educational notebooks