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# Fundamental Physics

The Focus Group for Fundamental Physics at the TUM-IAS explored the limitations of the current standard model of particle physics in order to arrive at a more powerful theory. As the first results of the Large Hadron Collider at CERN are already available and will be improved in the coming years, it is likely that a number of open questions in physics will be answered, setting the future direction of research in fundamental physics. The TUM-IAS Focus Group of Fundamental Physics is already using  the first experimental data of LHC to construct and test specific scenarios of physics beyond the standard model. These activities got recently strong support from the European Research Council which awarded the Advanced Grant (1.6 Mill Euro) to  Andrzej Buras, the leader of the Focus Group.  In this context the project "Towards the Construction of the Fundamental Theory of Flavour" will be executed in the period 2011-2016 with participation of first class researchers, in particular the Hans Fischer Senior Fellow, Gino Isidori.

Prof. Andrzej Buras of TUM expects fruitful years for particle physics as a consequence and spends this time as a Carl von Linde Senior Fellow at the TUM-IAS. He is acting as a "convener" for further fellows in order to expand this area of research at the TUM-IAS and leading a group at TUM that explores the consequences of models with supersymmetry and extra dimensions in flavour physics.

Dr. Martin Gorbahn was a Carl von Linde Junior Fellow at the TUM-IAS working also in close contact with the group of Prof. Andrzej Buras. He has two main objectives for his research group: Firstly to complement direct searches for new particles with improved analyses of precision flavour physics data to facilitate the tests of the standard model and various new physics scenarios. Secondly to search for and construct specific scenarios of new physics, which could be falsified by the ongoing experiments.

Dr. Gino Isidori joined TUM-IAS as Hans Fischer Senior Fellow in 2009. He is working in close contact with the other members of the Fundamental Physics group, establishing also a research link between TUM-IAS and his home institution (INFN Frascati Laboratories, Italy). Our main objective is to build extensions of the Standard Model at the TeV scale, trying to provide a consistent description of how the electroweak and the flavour symmetries are broken.

Prof. Stefan Pokorski has been a Hans Fischer Senior Fellow at TUM-IAS since 2009. His research is focused on the quest for a deeper theory of elementary interactions, beyond the Standard Model. For some time now particle physicists, cosmologists, and astroparticle physicists have been grappling with several of the most challenging and fundamental questions in science, such as the origin of mass of elementary particles, the nature of the so-called dark matter, and as yet inexplicable bias of our universe toward matter over antimatter. With the Large Hadron Collider experiments at CERN, we have good reasons to anticipate experimental discoveries beyond the Standard Model at the TeV mass scale, which would indicate the correct direction for the theory. The goal of our Fundamental Physics focus group is to search for such theoretical extension of the Standard Model.

TUM-IAS funded doctoral candidate:
Emmanuel Stamou (PhD in 2013)

Postdocs:
Robert Ziegler, CNRS, France (2010-2013, TUM)

## Publications by the Focus Group

### 2018

• Bobeth, Christoph; Buras, Andrzej J.: Leptoquarks meet ε'/ε and rare Kaon processes. Journal of High Energy Physics 2018 (2), 2018 more…
• Buras, A.J.: The Return of Kaon Flavour Physics. Acta Physica Polonica B 49 (6), 2018, 1043 more…
• Buras, Andrzej J.: The Dual QCD @ Work: 2018. EPJ Web of Conferences 192, 2018, 00048 more…
• Buras, Andrzej J.; Gérard, Jean-Marc: K → ππ and K − π matrix elements of the chromomagnetic operators from Dual QCD. Journal of High Energy Physics 2018 (7), 2018 more…
• Buras, Andrzej J.; Jung, Martin: Analytic inclusion of the scale dependence of the anomalous dimension matrix in Standard Model Effective Theory. Journal of High Energy Physics 2018 (6), 2018 more…

### 2017

• Bobeth, Christoph; Buras, Andrzej J.; Celis, Alejandro; Jung, Martin: Patterns of flavour violation in models with vector-like quarks. Journal of High Energy Physics 2017 (4), 2017 more…
• Bobeth, Christoph; Buras, Andrzej J.; Celis, Alejandro; Jung, Martin: Yukawa enhancement of Z-mediated new physics in ∆S = 2 and ∆B = 2 processes. Journal of High Energy Physics 2017 (7), 2017 more…
• Buras, Andrzej J.: Kaon Flavour Physics Strikes Back. Journal of Physics: Conference Series 800, 2017, 012001 more…

### 2016

• Blanke, Monika; Buras, Andrzej J.: Universal Unitarity Triangle 2016 and the tension between ΔMs,d and εK in CMFV models. The European Physical Journal C 76 (4), 2016 more…
• Blanke, Monika; Buras, Andrzej J.; Recksiegel, Stefan: Quark flavour observables in the Littlest Higgs model with T-parity after LHC Run 1. The European Physical Journal C 76 (4), 2016 more…
• Buras, Andrzej J.: New physics patterns in ε′/ε and ε K with implications for rare kaon decays and ∆M K. Journal of High Energy Physics 2016 (4), 2016, 1-66 more…
• Buras, Andrzej J.: The Revival of Kaon Flavour Physics. EPJ Web of Conferences 129, 2016, 00050 more…
• Buras, Andrzej J.; De Fazio, Fulvia: ε ′ /ε in 331 models. Journal of High Energy Physics 2016 (3), 2016 more…
• Buras, Andrzej J.; De Fazio, Fulvia: 331 Models Facing the Tensions in ΔF = 2 Processes with the Impact on ε ′ /ε, B s → μ + μ − and B →K ∗ μ + μ −. Journal of High Energy Physics 2016 (8), 2016 more…
• Buras, Andrzej; Regards, Best: The Renaissance of Kaon Flavour Physics. Proceedings of 16th International Conference on B-Physics at Frontier Machines — PoS(BEAUTY2016), Sissa Medialab, 2016 more…

### 2015

• Beaujean, Frederik; Bobeth, Christoph; Jahn, Stephan: Constraints on tensor and scalar couplings from $$B\rightarrow K\bar{\mu }\mu$$ B → K μ ¯ μ and $$B_s\rightarrow \bar{\mu }\mu$$ B s → μ ¯ μ. The European Physical Journal C 75 (9), 2015 more…
• Buras, Andrzej J.: Flavour physics: Status and perspectives. Annalen der Physik 528 (1-2), 2015, 96-101 more…
• Buras, Andrzej J.; Buttazzo, Dario; Girrbach-Noe, Jennifer; Knegjens, Robert: K+→π+νν¯¯¯ and KL→π0νν¯¯¯ in the Standard Model: status and perspectives. Journal of High Energy Physics 2015 (11), 2015 more…
• Buras, Andrzej J.; Buttazzo, Dario; Knegjens, Robert: K→πνν¯¯¯ and ε′/ε in simplified new physics models. Journal of High Energy Physics 2015 (11), 2015 more…
• Buras, Andrzej J.; Gorbahn, Martin; Jäger, Sebastian; Jamin, Matthias: Improved anatomy of ε′/ε in the Standard Model. Journal of High Energy Physics 2015 (11), 2015 more…

### 2014

• Barbieri, R.; Buttazzo, D.; Sala, F.; Straub, D. M.: Flavour physics and flavour symmetries after the first LHC phase. Journal of High Energy Physics 2014 (5), 2014 more…
• Beaujean, Frederik; Bobeth, Christoph; van Dyk, Danny: Comprehensive Bayesian analysis of rare (semi)leptonic and radiative $$\varvec{B}$$ B decays. The European Physical Journal C 74 (6), 2014 more…
• Bobeth, Christoph; Gorbahn, Martin; Hermann, Thomas; Misiak, Mikołaj; Stamou, Emmanuel; Steinhauser, Matthias: Bs,d→ℓ+ℓ−in the Standard Model with Reduced Theoretical Uncertainty. Physical Review Letters 112 (10), 2014 more…
• Bobeth, Christoph; Gorbahn, Martin; Stamou, Emmanuel: Electroweak corrections toBs,d→ℓ+ℓ−. Physical Review D 89 (3), 2014 more…
• Buras, Andrzej J.; Buttazzo, Dario; Girrbach-Noe, Jennifer; Knegjens, Robert: Can we reach the Zeptouniverse with rare K and B s,d decays? Journal of High Energy Physics 2014 (11), 2014 more…
• Buras, Andrzej J.; De Fazio, Fulvia; Girrbach, Jennifer: ΔI=1/2 rule, ε′/ε and K→πνν¯ in Z′(Z) and G′ models with FCNC quark couplings. The European Physical Journal C 74 (7), 2014 more…
• Buras, Andrzej J.; De Fazio, Fulvia; Girrbach, Jennifer: 331 models facing new b → sμ + μ − data. Journal of High Energy Physics 2014 (2), 2014 more…
• Buras, Andrzej J.; De Fazio, Fulvia; Girrbach-Noe, Jennifer: Z-Z′ mixing and Z-mediated FCNCs in SU(3) C × SU(3) L × U(1) X models. Journal of High Energy Physics 2014 (8), 2014 more…
• Buras, Andrzej J.; Gérard, Jean-Marc; Bardeen, William A.: Large N approach to Kaon decays and mixing 28 years later: ΔI=1/2 rule, B^K, and ΔMK. The European Physical Journal C 74 (5), 2014 more…
• Buras, Andrzej J; Girrbach, Jennifer: Towards the identification of new physics through quark flavour violating processes. Reports on Progress in Physics 77 (8), 2014, 086201 more…

### 2013

• Buras, Andrzej J.; De Fazio, Fulvia; Girrbach, Jennifer: The anatomy of Z ′ and Z with flavour changing neutral currents in the flavour precision era. Journal of High Energy Physics 2013 (2), 2013 more…
• Buras, Andrzej J.; De Fazio, Fulvia; Girrbach, Jennifer; Carlucci, Maria V.: The anatomy of quark flavour observables in 331 models in the flavour precision era. Journal of High Energy Physics 2013 (2), 2013 more…
• Buras, Andrzej J.; De Fazio, Fulvia; Girrbach, Jennifer; Knegjens, Robert; Nagai, Minoru: The anatomy of neutral scalars with FCNCs in the flavour precision era. Journal of High Energy Physics 2013 (6), 2013 more…
• Buras, Andrzej J.; Fleischer, Robert; Girrbach, Jennifer; Knegjens, Robert: Probing new physics with the B s → μ + μ − time-dependent rate. Journal of High Energy Physics 2013 (7), 2013 more…
• Buras, Andrzej J.; Girrbach, Jennifer: Left-handed Z′ and Z FCNC quark couplings facing new b → sμ + μ − data. Journal of High Energy Physics 2013 (12), 2013 more…
• Buras, Andrzej J.; Girrbach, Jennifer: Stringent tests of constrained Minimal Flavor Violation through ΔF=2 transitions. The European Physical Journal C 73 (9), 2013 more…
• Buras, Andrzej J.; Girrbach, Jennifer; Ziegler, Robert: Particle-antiparticle mixing, CP violation and rare K and B decays in a minimal theory of fermion masses. Journal of High Energy Physics 2013 (4), 2013 more…
• Stamou, Emmanuel: Flavour Physics Beyond the Standard Model in Top and Bottom Quarks. Dissertation, 2013 more…