Science is a wonderful thing if one doesn't have to earn one's living on it... [A.Einstein]
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Baryon and lepton number violation in the Standard Model and beyond

2017-2019 High-energy physics research project supported by the Grant Agency of the Czech Republic (GACR), project no. 17-04902S.

 Main researcher:
 Michal Malinský
 E-mail: malinskyipnp.mff.cuni.cz
 Phone: +420-22191 2438
 Fax: +420-22191 2434
Host institution:
Institute of Particle and Nucl. Phys.
School of Mathematics and Physics
Charles University
V Holešovičkách 2
180 00 Prague, Czech Republic
Team (current):
Michal Malinský
Jiří Hořejší
Jiří Novotný
Renato Fonseca
Matěj Hudec
Kateřina Jarkovská
Martin Zdráhal
previous members:
Helena Kolešová
Dylan Harries
Marián Kolesár

Project abstract:
The recently measured Higgs mass at around 125 GeV, together with the unprecedented lightness of neutrinos, suggests that the Standard Model of particle interactions is not an ultimate framework. While the former indicates an instability of the electroweak vacuum, the latter, in turn, suggests that lepton number is not an exact symmetry of Nature even at the perturbative level. Remarkably, both these concerns are connected to another issue of the modern cosmology, namely, the baryon to photon ratio underpinning nucleosynthesis in the early Universe which, in the Standard Model, falls some 9 orders of magnitude below the measurement. Among the extensions of the Standard model that may provide solutions to these problems, models with extended gauge symmetries play a prominent role. The assumed new dynamics not only provides spectacular signals of fundamental baryon number non-conservation in the beyond-Standard-Model physics but it is also likely to have played a central role in the hot primordial plasma of the early Universe where the baryonic matter excess was supposedly created. The project aims at forming and sustaining a strong theory group with expertise to exploit the possible signals of baryon number violation in BSM physics (proton decay, collider effects of leptoquarks, baryon asymmetry of the early Universe etc.)

Publications   
Collider phenomenology of a unified leptoquark model
T. Faber, M. Hudec, H. Kolesova, Y. Liu, M. Malinský, W. Porod and F. Staub
arXiv:1812.07592 [hep-ph], to be submitted to Physical Review D.
A unified leptoquark model confronted with lepton non-universality in B-meson decays
T. Faber, M. Hudec, M. Malinský, P. Meinzinger, W. Porod and F. Staub
arXiv:1808.05511 [hep-ph], published in Physics Letters B787, 159 (2018).
Witten's loop in the flipped SU(5) unification revisited
D. Harries, M. Malinský, M. Zdráhal
arXiv:1808.02339 [hep-ph], published in Physical Review D98, 095015 (2018).
Systematic classification of three-loop realizations of the Weinberg operator
R. Cedepello, R.M. Fonseca, M. Hirsch
arXiv:1807.00629 [hep-ph], published in JHEP 1810, 197 (2018).
High-dimensional neutrino masses
G. Anamiati, O. Castillo-Felisola, R.M. Fonseca, J.C. Helo, M. Hirsch
arXiv:1806.07264 [hep-ph], published in JHEP 1812 (2018) 066.
FlexibleSUSY 2.0: Extensions to investigate the phenomenology of SUSY and non-SUSY models
Peter Athron, Markus Bach, Dylan Harries et al.
arXiv:1710.03760 [hep-ph], published in Comput.Phys.Commun. 230 (2018) 145-217.
Effects of ultra-light dark matter on the gravitational quantum well
Paolo Castorina, Alfredo Iorio, Michal Malinský
arXiv:1707.08612 [hep-ph], published in International Journal of Modern Physics D27, 1850098 (2018).
Bayesian analysis and naturalness of (Next-to-)Minimal Supersymmetric Models
Peter Athron, Csaba Balazs, Dylan Harries, et al.
arXiv:1709.07895 [hep-ph], published in JHEP 1710 (2017) 160.
Flavour Structure of GUTs and Uncertainties in Proton Lifetime Estimates
M. Malinský, H. Kolešová
arXiv:1612.09178 [hep-ph], accepted in Physical Review D (2019), to appear soon.
One-loop pseudo-Goldstone masses in the minimal SO(10) Higgs model
M. Malinský, L. Gráf, T. Mede and V. Susič
arXiv:1611.01021 [hep-ph], published in Physical Review D95, 075007 (2017).
Presentations   
Non-renormalizable interactions of the Standard Model fields
Talk given at the "The quest for new physics" conference, Valencia SPAIN, 12-14 December 2018.
Violation of lepton number in 3 units
Talk given at the "6th Symposium on Prospects in the Physics of Discrete Symmetries (DISCRETE18)", Vienna AUSTRIA, 26-30 November 2018.
CZ/SK BSM theory
Talk given at the "CZ/SK Particle physics strategy meeting", Prague, 14 September 2018.
Standard Model and Beyond
Series of seminar/lecture talks given at the "DKPI Summer School 2018" held in Hirschwang (Austria), 17 - 21 September 2018.
FlexibleSUSY: Precise automated calculations in any BSM theory
Talk given at the "39th International Conference on High Energy Physics (ICHEP 2018)" international conference, Seoul, Gangnam-Gu, Korea, July 5, 2018.
Witten's loop in the flipped SU(5) unification revisited
Talk given at the "Pascos 2018" international conference, CWRU, Cleveland, Ohio, June 5, 2018.
Pseudo-Goldstone scalars in the minimal SO(10) Higgs model
Talk given at the "Planck 2018" international conference, Bonn, May 24, 2018.
Witten's loop in the flipped SU(5) unification revisited
Talk given at the "Planck 2018" international conference, Bonn, May 24, 2018.
Planck-scale induced uncertainties in proton lifetime estimates and flavour structure of GUTs
Talk given at the "Planck 2018" international conference, Bonn, May 24, 2018.
Bayesian Analysis and Naturalness in (Next-to-)Minimal SUSY Models
Talk given at the "Planck 2018" international conference, Bonn, May 24, 2018.
Bayesian Analysis and Naturalness in (Next-to-)Minimal SUSY Models
Talk given at the "Phenomenology 2018 Symposium" conference, Pittsburgh, May 7, 2018.
Neutrinos in cosmology
Talk given at the "International colloquium on neutrino physics 2017", Prague, November 2, 2017.
Particle physics beyond the Standard Model
Outreach talk at the observatory and planetarium of Brno, November 2, 2017.
Dark matter
Outreach talk for the BSc. students at IPNP CUNI, October 31, 2017.
Gravitational quantum well
Seminar given at IFIC/CSIC , Valencia, Spain, September 17, 2017.
Proton lifetime estimates in simple GUTs
Talk given at the BLV2017 conference, Cleveland, Ohio, May 16, 2017.
Theoretical uncertainties in proton lifetime estimates
Talk given at the conference "New physics at the junction of flavor and collider phenomenology", Portoroz, Slovenia, April 21, 2017.
On the origin of matter
Talk given at the general gathering of the Czech learned society, March 6 2017.
Other activities   
Organization of conferences:
10.9.2018 - 14.9.2018: Gravity @ Prague 2018.
4.9.2017 - 8.9.2017: 29th Indian-Summer School of Physics - Topics in cosmology.
5.6.2017 - 9.6.2017: Flavour Physics and CP violation (FPCP) 2018.

Outreach activities:
20.4.2018: "O původu hmoty z hlediska částicové fyziky (On the origin of matter from the particle physics perspective)" - "Friday evening public lecture", Prague, Czech Republic.
30.11.2017: "Velké sjednocení interakcí (Grand unification of particle interactions)" - popular lecture given at the observatory and planetarium in Brno, Czech Republic.
2.11.2017: "Částicová fyzika za hranicemi Standardního modelu mikrosvěta (Particle physics beyond the Standard model)" - popular lecture given at the observatory and planetarium in Brno, Czech Republic.
21.2.2017: "O původu hmoty (On the origin of matter)" - popular lecture during the 1st Learned Society 2017 meeting, Prague, Czech Republic.

Project funded by the Grant Agency of the Czech Republic, contract no. 17-04902S.