Part A. PERSONAL DATA

A.1 Current Professional Status

Institution: University of Valencia

Department: Theoretical Physics (Faculty of Physics) and IFIC (Joint UV-CSIC Center)

Professional Category: Full Professor

UNESCO Code: 2212 Theoretical Physics

Keywords: Quantum field theory, electroweak theory, QCD, and Higgs physics. Theories beyond the Standard Model: Dual and string theories

A.2 Academic Background

Degree: Bachelor of Science in Physics, University of Valencia (1981)

Degree: Doctor of Philosophy in Physics, University of Valencia (1985)

A.3 General Indicators of Scientific Production Quality

• Number of six-year research periods: 6 (last six-year period 2012-2017)

• Field of Scientific Activity: Theoretical Physics (Dual and string theories. Theory and phenomenology of elementary particles and their interactions.)

• Research Associate at the Rutherford Laboratory (U.K.) from 1986 to 1991.

• Publications: approximately 75 articles in journals indexed in the SCI (Physical Review, Physical Review Letters, JHEP, Nuclear Physics, Astrophysical Journal, Europhysics Letters, etc.).

• Total citations (Inspire Hep): 1240

• Hours: 21

• Award from the Royal Academy of Exact and Physical Sciences (1985).

A4. General Academic Indicators

4.1. Teaching Service Periods: 6

4.2. Teaching Evaluation Results:

Evaluation of activity through the DOCENTIA program (2015–2020): 189/200

Annual evaluation reports (2019–2024). Average: 4.45

4.3. Management Positions Held (in the past).

Head of the Department of Theoretical Physics: one term.

Secretary of the Department of Theoretical Physics: three terms.

Coordinator of International Relations for Physics for eleven years.

Part B. CURRICULUM VITAE SUMMARY

ORCID Code: 0000-0002-0511-271X

Fields within Theoretical Physics in which I have developed activities whose results are published in international journals.

• Theories beyond the Standard Model (from 2000 to the present and future project). Work carried out with Professors H. M. Chan (Rutherford Lab.) and T. S. Tseung (University of Oxford), along with doctoral students and other occasional collaborators. 35 publications.

Contribution: Development of a theory of elementary particles beyond the Standard Model (Framed Standard Model or FSM) that aims to address some outstanding theoretical problems, such as the hierarchy of fermion masses and mixtures, or "strange" experimental results recently observed in particle physics. During the period indicated, an exhaustive study of the model was conducted, comparing it with experimental data without, so far, finding any contradictions. The results have led to approximately fifty publications and conference presentations.

• Summation rules in Quantum Chromodynamics (1986-89 and 2000-10). This work was carried out with Professors C. Domínguez (University of Cape Town), F. Schilcher (University of Mainz), J. A. Peñarrocha, and V. Giménez (University of Valencia), along with doctoral students and other occasional collaborators. 17 publications. Based on general properties of the two-point correlation function, relationships are established between its asymptotic expansion at high energies and its imaginary part in the domain of hadronic physics.

Novel contribution: Introduction of the finite-energy Laplace summation rule to estimate quark-gluon condensates, heavy quark masses (charm and bottom), decay constants of mesons containing b or s quarks, and other problems related to low-energy hadronic physics.

• String and superstring field theory (1986–2001). Work carried out with Professors H. M. Chan (Rutherford Lab.) and T. S. Tseung (University of Oxford), along with doctoral students and other occasional collaborators. 18 publications.

Novel Contribution 1 (1986-90): Discretization of strings. Treatment of functional integrals through string discretization and numerical calculation of interaction amplitudes.

Novel Contribution 2 (1991-2001): Interpretation of the interaction in string theory by applying the original half-string overlap mechanism to (non-polynomial) string field theory, identifying the parameter space in the different channels as well as the transition region between them, which does not appear in an explicit formulation using Feynman diagrams and must be explicitly included at each order.

Novel Contribution 3: Description of the theory using half-string oscillators (“commas”). Calculation of amplitudes and study of formal aspects of string theory in this formulation, particularly suitable for the formulation of a field theory.

• Two-photon physics in the lepton-hadron collision (1981-85). 3 publications and subject of the Doctoral Thesis. Study of the electromagnetic interaction beyond the one-photon exchange approximation by calculating the two-photon exchange interaction in the lepton-nucleus collision predicted by QED.

Contribution: treatment of the hadronic continuum that depends on characteristic magnitudes of the hadronic structure.

• Parity violation in atoms (1981 and 87). 2 publications and subject of the Bachelor's Thesis. Study of electroweak couplings between quarks and leptons at energies typical of the atomic structure by analyzing atomic transitions sensitive to the mixing of parity-defined states induced by neutral currents.

Novel contribution: introduction of nuclear spin in the study of parity violation-sensitive electromagnetic transitions in muonic atoms.

Part C. MOST RELEVANT MERITS.

C.1. Ten most interesting publications (in my opinion).

1. J. Bordes, H. M. Chan and S. T. Tsou, “A vacuum transition in the FSM with a possible new take on the horizon problem in cosmology”, Int. J. Mod. Phys. A 38 (2023) no. 25, 2350124 doi:10.1142/S0217751X23501245
2. J. Bordes, H. M. Chan and S. T. Tsou, “Unified FSM treatment of CP physics extended to hidden sector giving (i) δCP for leptons as prediction, (ii) new hints on the material content of the universe,” Int. J. Mod. Phys. A 36 (2021) no.31n32, 2150238 doi:10.1142/S0217751X21502389
3. J. Bordes, H. M. Chan and S. T. Tsou, “Accommodating three low-scale anomalies (g-2, Lamb shift, and Atomki) in the framed standard model,” Int. J. Mod. Phys. A 34 (2019) no.25, 1950140 doi:10.1142/S0217751X19501409
4. J. Bordes, H. M. Chan and S. T. Tsou, “Generation patterns, modified γ−Z mixing, and hidden sector with dark matter candidates as framed standard model results,” Int. J. Mod. Phys. A 33 (2019) no.36, 1830034 doi:10.1142/S0217751X1830034X
5. S. Bodenstein, J. Bordes, C. A. Dominguez, J. Penarrocha and K. Schilcher, “Bottom quark mass from finite energy QCD sum rules,” Phys. Rev. D 85 (2012), 034003 doi:10.1103/PhysRevD.85.034003
6. J. Bordes, H. M. Chan and S. T. Tsou, “A Dynamical mechanism for quark mixing and neutrino oscillations,” Eur. Phys. J. C 10 (1999), 63-70 doi:10.1007/s100529900092
7. J. Bordes, H. M. Chan, J. Faridani, J. Pfaudler and S. T. Tsou, “Possible test for the suggestion that air showers with E > 10**20-eV are due to strongly interacting neutrinos,” Astropart. Phys. 8 (1998), 135-140 doi:10.1016/S0927-6505(97)00039-X
8. J. Bordes, H. M. Chan, L. Nellen and S. T. Tsou, “HALF STRING OSCILLATOR APPROACH TO STRING FIELD THEORY,” Nucl. Phys. B 351 (1991), 441-473 doi:10.1016/0550-3213(91)90097-H
9. J. Bordes and F. Lizzi, “Computation of Amplitudes in the Discretized Approach to String Field Theory,” Phys. Rev. Lett. 61 (1988), 278 doi:10.1103/PhysRevLett.61.278
10. J. Bordes, “E(6) Signatures in Atomic Physics,” Phys. Lett. B 190 (1987), 97 doi:10.1016/0370-2693(87)90846-X

C.2. Participation in R&D&I Projects

• Participation in projects funded by the Spanish Ministry of Education and Science (or equivalent at the time) and the EU from 1981 to the present in the field of “Elementary Particles: The Standard Model and its extensions”. Currently with reference PID2023-151418NB-I00 MCIU/AEI/10.13039/501100011033/FEDER.
• Participation in PROMETEO projects funded by the Valencian Regional Government from 2002 to the present in the field of “Particle Physics and their interactions”. Currently with reference PROMETEO CIPROM/2022/36.
• Member of IFIC, Severo Ochoa Center. Currently with reference CEX2023-001292-S.
• Participation in the UVEG innovation project in the period 2009-2015: Virtual Laboratory of Chemical Physics.

[Biography, english version]

[Biography, english version]

Graduated in Physics from the University of Valencia (UV) in June 1978 (second national prize in physics and special honors degree in 1979). Ph.D. in Physics from UV in March 1983, supervised by Prof. José Bernabeu with a thesis entitled "Analysis of the Structure of Charged and Neutral Currents from Nuclear Semileptonic Processes". Having been Research Fellow, Assistant Professor and Acting Associate Professor at UV, I got a Fulbright-MEC fellowship and I joined the Brookhaven National Laboratory (BNL), as a postdoctoral fellow two years until late 1986. In 1987 I joined the Department of Theoretical Physics of UV as Associate Professor in Theoretical Physics, and almost simultaneously I become member of Instituto de Física Corpuscular (IFIC), a Joint Center of CSIC and UV. Since April 2010 I am Professor (Catedrático) of Theoretical Physics at UV. I have made long stays at the University of Davis (California), again at BNL New York, in the INT of Seattle, and during several years at the IST in Lisbon and at CERN.

I have been Deputy Director of IFIC from 1991 to 1998, ERASMUS coordinator of Physics at U. Valencia from 2002 to 2007 and director of IFIC from May 2007 to July 2015, during this period IFIC was awarded the famous “Severo Ochoa Execelence Grant”.

I have been Principal Investigator (PI) of the theory research projects "Fundamental Interactions and its Experimental Implications" since 2002, funded by MEC, MICINN and MINECO in their FPA2002-00612 (202.600€), FPA2005-01678 (385.560€), FPA2008-02878 (487.388€) and FPA2011-23596 (450.120€) versions of the National Plan for Particle Physics from 2003 till 2015.

In 2010, at IFIC, with my experimental colleagues from Babar Fernando Martinez-Vidal and Arantza Oyanguren, we joined efforts in order to promote IFIC participation at LHCb. Mainly for this purpose I have been PI of the excellence PROMETEO projects, funded by Generalitat Valenciana: GVPROMETEO2010-056 (274.620€), GVPROMETEOII2014-049 (284.150€), PROMETEO/2019/113 (213.065€) and CIPROM/2022/36 (600.000€) from 2010 till 2025.

I have supervised six doctoral theses: i) “CP violation in Particle” by J. Roldán (1991), ii) “The neutrino-electron collision: a test of the neutrino properties” by J. Segura (1994), iii) “Neutral and charged current couplings at high luminosity meson factories” by O. Vives (1997), iv) “CP violation and New Physics in B mesons” by M. Nebot (2005) and v) “Taming Flavor in Two Higgs Doublet Models” by F. Cornet-Gómez (2021), vi) “Flavor, Higgses and CP Violation” by Carlos Miró (2025). Now I am co-supervising one doctoral students J. F. Bastos at CFTP from IST in Lisbon.

My fields of expertise are in Theoretical Particle Physics: The Standard Model and Beyond, but especially Flavour Physics, CP violation, Higgs Physics and Neutrino Physics.

I have collaborated at BNL with Ling-Lie Chau, C.S. Lim and W. Marciano in CP Violation, Rare decays and in Radiative Corrections to the Neutrino Refractive Index in a dense neutral astrophysical medium. Roldan’s thesis had impact on the construction of the Frascaty Phi factory; we also study, for the first time, self-energy diagrams to generate Baryon Asymmetry in the Universe (BAU) -this mechanism was later rescued for leptogenesis-. In J. Segura’s thesis we had the distinguished collaboration of the late Samoil Bilenky. In the thesis of Vives, we assess the impact of B factories in FCNC processes and its consequences for heavy vector-like fermions. During this period a -still ongoing- collaboration started with Lisbon Branco’s group including Rebelo and Silva-Marcos.

In this Lisbon-Valencia collaboration we have produced relevant contributions related to Model Independent extraction of the complex CKM matrix from B data, and therefore assessing the complexity of CKM even in the presence of New Physics. Also, we have released Invariant formulations under Flavour symmetries of CP violating quantities. These last two topics where mainly developed in Miguel Nebot thesis. The collaboration has evolved towards Phenomenology of two Higgs doublet models including Flavour Changing Higgs couplings, Minimal Flavour Violation and Spontaneous CP violation. Some of these topics appear in Cornet-Gómez thesis. Also, with J. P. Silva, sometime ago we released an invariant formulation of multi-Higgs models including the quark and the scalar sector, this collaboration has included also David London and S. Baek at Montreal. More recently we are collaborating in Phenomenology of Models with singlet vector-like quarks in J. F. Bastos thesis.

With J. Bernabéu we have been taking advantage of the initial entangled states at a B factory to generalize the Babar measurement of T violation to arbitrary decay channel, study CPT violating effects and proposing new ways of measuring the CP violating phase gamma. With the Valencia LHCb team I have been collaborating on the study of EDM and MDM of heavy fermions at LHCb. More recently we are studying the evolution of the polarization in the decay chains of heavy baryons.

Some numbers:

“Sexenios”: 6. (Last awarded in July 2015)

Thesis (last 5 years): 2 (1 in progress). In total 6 (7).

Total Number Citations: 1.794 (*). From inSpire (5377,2417)

Citations in last 5 years: 495(*)

Number of types Q1 papers: 58.

Index h=24 (*). From inSpire (30,29)

(*) Data from Scopus in 2025

Most cited recent papers (# Scopus, # inSpire)

Muon and electron g- 2 anomalies in a flavor conserving 2HDM with an oblique view on the CDF MW value. Eur.Phys.J.C 82 (2022) 915. With F. Cornet-Gómez, Carlos Miro and M. Nebot. (28,49)

Electron and muon g−2 anomalies in general flavour conserving two Higgs doublets models. Phys.Rev.D 102 (2020) 3, 035023. W/ F. Cornet-Gómez and M. Nebot. (51,61)

Vacuum Induced CP Violation Generating a Complex CKM Matrix with Controlled Scalar FCNC. Eur.Phys.J.C 79 (2019) 8, 711. W/ Miguel Nebot and Gustavo C. Branco. (18,23)

Flavor conservation in two-Higgs-doublet models. Phys.Rev.D 98 (2018) 3, 035046. W/ F. Cornet-Gómez and M. Nebot. (24,36)

Controlled Flavour Changing Neutral Couplings in Two Higgs Doublet Models. Eur.Phys.J.C 77 (2017) 9, 585. W/ J. M. Alves, G. C. Branco, F. Cornet-Gomez and M. Nebot. (22,29)

On the search for the electric dipole moment of strange and charm baryons at LHC. Eur.Phys.J. C77 (2017) 3, 181. W/ L.M. Garcia Martin, D. Marangotto, F. Martinez Vidal, A. Merli, N. Neri, A. Oyanguren and J. Ruiz Vidal. (49,84)

Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector. DOI: 10.23731/CYRM-2017-002. W/ LHC Higgs Cross Section Working Group (D. de Florian et al.). (-,2673)

Other most cited papers

Jarlskog-like invariants for theories with scalars and fermions. Phys.Rev. D51,3870,1995. W/ Joao P. Silva. (241, 291)

Anticipating the higher generations of quarks from rephasing invariance of the mixing matrix. Phys.Lett. B168,97,1986. W/ Ling-Lie Chau. (122, 169)

Radiative corrections to neutrino indices of refraction. Phys.Rev. D35,896,1987. W/ C-S. Lim and W.J. Marciano. (111,138)

Flavour-changing Higgs couplings in a class of two Higgs doublet models. Eur.Phys.J. C76 (2016) no.3, 161. W/ G.C. Branco, M. Nebot and M.N. Rebelo. (101,132)

Minimal flavour violation and multi-Higgs models. Phys.Lett. B687:194-200,2010. W/ G.C. Branco y M.N. Rebelo. (83,101)

Lectures and Presentations

IDPASC School. Udine 2012.

Workshop on Multi-Higgs Models. Lisbon 2012, 2022, 2024.

Seminar at U. of Warsaw. 2013.

Summer School and Workshop on the Standard Model and Beyond. Corfu 2013, 2015, 2017, 2019, 2021, 2023.

Workshop: TeV-scale Physics after the Discovery of the Higgs Particle. TWCU. Tokyo 2014.

Scalars 2015. Warsow

DISCRETE: Fourth Symposium on prospects in the Physics of Discrete Symmetries. King's College London (2012) and Baden-Baden (2022).

I hold a Bachelor’s degree in Physical Sciences from the University of Valencia and a PhD in Physics from Simón Bolívar University, Venezuela. I am currently a tenured Associate Professor in the Department of Theoretical Physics at the University of Valencia. Previously, I held a position as a Contracted Doctoral Researcher at the University of Valencia Foundation and, before that, as a Ramón y Cajal Researcher in the same department at the University of Valencia. I have carried out postdoctoral research stays in Venezuela (Venezuelan Institute for Scientific Research, IVIC), in the United States (University of California, Los Angeles, UCLA), and in Italy (Department of Physics, Politecnico di Torino). I have also been a researcher at the Italian National Institute for Nuclear Physics (INFN).

I have published more than 45 scientific articles and one book, as well as contributions to book chapters and proceedings. My research has focused on quantum deformations, string theory, supergravity.supergeometry, and, more recently, quantum information.

I have extensive teaching experience, ranging from introductory Physics courses to Mathematical Methods for Physics, Classical Mechanics, and Modern Physics (Special Relativity and Quantum Physics). I have supervised four PhD theses and a significant number of Bachelor’s and Master’s final projects.

I have served as an organizer of conferences in Valencia and am a member of the scientific committees of several of these conferences. I am a member of the Standing Committee of ICGTMP. In addition to acting as a referee for a number of scientific journals, I am an editor of two of them.

As an evaluator, I have participated in several committees at the national level and, perhaps more importantly, I have served as an expert and vice-chair in evaluations for the Marie Skłodowska-Curie Actions (MSCA). I have taken part in numerous PhD thesis and academic examination committees.

[Biography, english version]

I did my undergraduate studies in Physics at the University of Athens, where I graduated in 1985. I then commenced my doctorate studies at the University of California, Los Angeles (UCLA), from where I obtained my Ph.D. degree in 1990. 

My thesis advisor was John M. Cornwall, and my thesis research centered on the construction of gauge-independent off-shell Green’s functions with the method known as “pinch technique”. My doctorate work offered new insights on the structure of the three-gluon vertex, a central ingredient of Quantum Chromodynamics. In addition, the application of the pinch technique led to the first gauge-independent definition of the neutrino charge radius, a quantity currently measured atEnuES and CEnuES experiments. 

Subsequently, I had a two-year post-doctoral appointment (1990-1992) at Brookhaven National Laboratory (BNL), a three-year post-doctoral appointment (1992-1995) at New York University (NYU), a one-year appointment at the CPT of Marseille, and a one-year post-doc at University of Manchester (1997), after which I obtained a Marie Curie Fellowship at the Theory Division of CERN for two years (1997-1999). Since 1999 I have been employed by the University of Valencia, Department of Theoretical Physics, first as visiting professor, then as Ramon y Cajal fellow, and finally as “Profesor Titular”, which is my current position.

A considerable part of my early scientific activity was dedicated in the development of the aforementioned “pinch technique “. In its original form, this technique is a systematic rearrangement of the standard perturbative expansion (Feynman diagrams) contributing to a physical amplitude in such a way as to define gauge-independent sub-amplitudes, which may be interpreted as effective Green’s functions (e.g., propagators and vertices). The activity related to this technique gave rise to a plethora of phenomenological and formal applications, such as the definitions of the QCD equivalent of the strong effective charge, in complete analogy to the text-book construction of the “Gell-Mann -- Low “effective charge known from Quantum Electrodynamics. In addition, a particularly relevant success for phenomenology has been the self-consistent description of resonant amplitudes, in collaboration with Professor A. Pilfatsis (University of Manchester).

During the years 2000-2005 I focused my efforts on the formal foundations of the pinch technique in collaboration with Daniele Binosi (currently a permanent researcher at ECT*, Trento, Italy), who, at the time, was carrying out his doctorate work at the University of Valencia. Our collaboration gave rise to an elegant formulation of the pinch technique in the language of the so-called “background field method” and the “Batalin-Vilkovisky” quantization scheme. The resulting doctorate thesis won the “outstanding thesis prize” for the year 2002, awarded by the University of Valencia, signifying it as the best thesis of the entire university. 

At the level of publications, it is important to emphasize two special items, namely (i) the review article “Pinch Technique: Theory and Applications”, Physics Reports 479 (2009), co-authored with D. Binosi, which to date has collected 450 citations (source HEP Inspires) and (ii) a Cambridge University Monograph (2011), titled “The Pinch Technique and its Applications to Non-Abelian Gauge Theories”, co-authored with J. M. Cornwall and D. Binosi in 2010.

Since 2007 my research activity has centered on some of the most important non-perturbative aspects of Quantum Chromodynamics (QCD), such as the generation of a mass gap in the gauge sector, the phenomenon of dynamical chiral symmetry breaking, the study of the structure of the fundamental vertices of the theory, and the formation of the observed bound states (hadrons) out of the fundamental degrees of freedom known as gluons and quarks.

 In particular, I am one of the major proponents of the key notion that the famous “Schwinger mechanism” operates in the gauge sector of QCD, leading to the subsequent emergence of an effective gluon mass scale. This result has far-reaching consequences for the physics of strong interactions, because it cures the infrared divergences known from perturbation theory, and allows for completely finite predictions for the key QCD observables measured in a variety of experimental installations.

In addition, the emergence of the aforementioned mass allows the meaningful extension of the QCD effective charge, originally defined perturbatively through the pinch technique, to the low-energy regime of the theory. This constitutes a theoretical milestone, because, historically, such a connection has been thwarted by the presence of the destabilizing “Landau pole”.  In this sense,  one accomplishes the smooth transition between the two most celebrated phenomena of QCD, namely asymptotic freedom in the ultraviolet and confinement in the infrared. This work has attracted considerable attention, giving rise to several publications, four invited review articles, and numerous presentations at international workshops.

In addition, and with equal vigor, I have been involved in the study of the non-perturbative structure of the fundamental Green’s functions (also known as “correlation function”) of QCD.  This ongoing activity is based on the fruitful synergy between continuous approaches (Schwinger-Dyson equations) and gauge-fixed lattice simulations.  These functions represent the building blocks of the physical observables studied in hadronic physics, and are of the utmost importance for the meaningful comparison between theory and experimental reality. Especially important in this context is the three-gluon vertex, which is instrumental for the manifestation of asymptotic freedom, one pf the most celebrated properties of Yang-Mills theories, in general, and of QCD in particular. This particular vertex has received particular attention in the last 5 years, and has been scrutinized in detail, in collaboration with the lattice groups of the University of Huelva and the University of Pablo de Olavide (Sevilla).  This research gave rise to terms such as the “zero crossing” and the “planar degeneracy”, which have become household names among the practitioners of this field.

My research activity includes also Physics beyond the Standard Model. In particular, I have various works on the physics related with extra dimensions, mainly in collaboration with Professor Arcadi Santamaria. In addition, I have a long-standing collaboration with Professor Nick Mavromatos (King’s College, London and University of Athens); our more distinguished work is a collection of articles on CPT violation and entanglement, and certain theoretical aspects pertaining to the Moedal collaboration.  

I have an extensive network of collaborators, particularly in Germany, Brazil, Italy, and China.  Specifically, I have been coordinating for over a decade the activities of the QCD group of the University of Campinas, (Sao Paolo). This intense collaboration gave rise to a large number of publications and doctorate titles.  In addition, I hold a one-year EMMI visiting position, (https://www.gsi.de/emmi_visiting_professors) of  GSI, to be carried out at the Institute for Theoretical Physics, University of Heidelberg, for the purpose of strengthening my ongoing collaboration with the research group of Prof. Jan Pawlowski. Moreover, I am a member of the international collaboration led by Professor Craig D. Roberts of the Institute of Nonperturbative Physics (INP) in Nanjing, China, with whom I have co-authored several highly cited articles (94 citations/article). In addition, I have strong ties and fruitful collaboration with the Sevilla and Huelva groups, and in particular with Professors J. Rodríguez-Quintero and F. De Soto.

I am a member of the International MoEDAL Collaboration (Monopole and Exotics Detector at the LHC), https://home.cern/tags/moedal , and I have been voting member of the “International Light Cone Advisory Committee (ILCAC, http://www.ilcacinc.org/ ), for the period 2010-2020. Furthermore I was awarded the American Physical Society (APS) Outstanding Referee Award for the year 2017.  

I have a total of 188 publications, 142 of them in high impact peered review journals, and 40 Conference Proceedings. All these publications have accumulated a total of 9447 citations. My “h factor” is h=59.   https://inspirehep.net/literature?sort=mostrecent&size=25&page=1&q=a%20papavassiliou%2Cj&ui-citation-summary=true

[Biography, english version]

[Biography, english version]

Scientific Career:

In 1987-88, I was a postdoc at Carnegie Mellon University, Pittsburgh (USA). In 1989-90, I was a postdoc at the Max Planck Institute for Physics in Munich, Germany. In 1989, I obtained a tenured position as Associate Professor at the University of Valencia through a competitive examination. From 1992-94, I held a CERN fellowship at CERN, Geneva, Switzerland. In 2007, I obtained the qualification for Full Professor through a competitive examination, and since 2008, I have been a Full Professor at the University of Valencia.

Research lines and key contributions:

1. Quantum Corrections in the Standard Model:
   Various results have been obtained in this area, but perhaps the most significant is the discovery of the non-decoupling effects of the top quark in the Z-b-b interaction. This result was published at the time and was essential in determining the top quark mass at LEP before its discovery at Fermilab (Bernabéu, Pich & Santamaria).

2. Massive Neutrinos:
   Recently, we have confirmed that neutrinos do indeed have mass. However, there is still no “standard model of massive neutrinos.” It is therefore crucial to develop a model capable of describing all experimental data and that can be tested in the future. In this field, we have published several high-impact articles proposing and studying different models to explain the small neutrino masses (with Bertolini, Valle, Nebot, Oliver, Palao, del Águila, Bhattacharya, Aparici, Wudka, Herrero-Garcia, Rius, Das, Alcaide).

3. Higgs Boson Physics in the Standard Model and Its Extensions:
   The Higgs boson has finally been discovered at the LHC, and exploring its properties is crucial. We have been working in this area for some time. We studied the possibility of the Higgs boson decaying invisibly into other scalars (Bertolini & Santamaria). Recently, CMS and ATLAS reported hints of Higgs decays violating lepton flavor, and we have thoroughly explored this possibility (Herrero-Garcia, Rius & Santamaria). We have also analyzed the scalar mass spectrum in a model with scalar triplets, considering the known properties of the Higgs boson (Das & Santamaria).

4. Tau Lepton Physics:
   A phenomenological resonance model was developed to describe tau lepton decays into two and three pions, which has been widely used (Kühn & Santamaria). Additionally, the magnetic moment of the tau lepton was determined using experimental data from LEP (Gonzalez-Springer, Santamaria & Vidal).

5. Particles in Astrophysics:
   In this field, aside from implications for specific models, a key contribution was the systematic study of new neutrino interactions in supernova cooling (Choi & Santamaria).

    

6. Effective Quantum Field Theories (EFTs):
   We have studied, in general, the use of EFTs to analyze new physics (Bilenky & Santamaria) and to simplify the calculation of radiative corrections in renormalizable theories (Peris & Santamaria). In recent years, we have also used EFTs to describe neutrino masses in the most model-independent way possible (del Águila, Aparici & Wudka).

7. Theories with Extra Dimensions:
   We have analyzed the quantum effects of additional dimensions in the decay of the Z boson into b quarks (Oliver, Papavassiliou & Santamaria). Additionally, we have studied the calculability of quantum effects that grow with energy in such models. Controlling these effects is essential for constructing a theory that unifies all interactions at experimentally accessible energy scales (Oliver, Papavassiliou & Santamaria).

8. Mass Running and QCD:
   In quantum field theories, mass appears as another parameter of the theory, almost at the same level as coupling constants. As such, it is not a fixed quantity but varies with energy. However, until recently, the variation of mass with energy had never been experimentally verified. A key milestone was suggesting that the LEP experiment might have the necessary precision to test the energy dependence of the b quark mass (Bilenky, Rodrigo & Santamaria). This verification required highly complex calculations by our group and a sophisticated experimental analysis carried out by the DELPHI collaboration in Valencia (Fuster et al.). Thanks to this collaboration between theoretical and experimental groups in Valencia, we can now confirm that quark masses evolve with the energy scale.