Concordia University

Mariana Frank Research Group

Most of our work is devoted to the prediction, anticipation, and explanation of new signals coming from various accelerators, in particular, from the Large Hadron Collider (LHC), in particular, to specialized searches of Physics Beyond The Standard Model of electroweak interaction. These searches are motivated by the fact that the Standard Model, while experimentally successful, still suffers from theoretical inconsistencies, and it does not explain all phenomena observed in nature (such as, for example, dark matter).

Mariana Frank research group members in 2019. Mariana Frank research group members, 2019: (left to right) Kıvanç Çıngıloğlu, Dr. Mariana Frank, Eric Gyabeng Fuakye, Jack Araz and (inset) Özer Özdal.

Physics at the Large Hadron Collider (LHC)

Some of our research projects are:

Aerial View of the CERN taken in 2008. Credit: CERN. Photograph by Maximilien Brice.

The most popular scenario for physics beyond the Standard Model is Supersymmetry. Supersymmetry is a fermion-boson symmetry which provides a dark matter candidate naturally and which explains the stability of the Higgs mass.

Standard model particles and SUSY particles. Source: Quanta Magazine.

We work on non-minimal models, such as U(1)’ models and left-right supersymmetric models, looking for viable dark matter candidates and for distinguishing signals at the LHC.

Warped dimensions. See arXiv:1004.2037.

Introducing an extra space dimension and a warping of the space associated with it provides a viable explanation of why gravity is so weak at the Standard Model scale. Allowing the Standard Model particles to propagate in the extra dimension resolves fermion mass hierarchies and supresses flavour-changing currents.

In its original version of the model, the scale of this theory has to be high, precluding its observation at the LHC. We are exploring a version with a modified metric, which allows the scale to be lower and agrees with the data from the Higgs discovery. 

Simulated Large Hadron Collider CMS particle detector data depicting a Higgs boson produced by colliding protons decaying into hadron jets and electrons. Credit: CERN.

A spectacular signature of Physics Beyond the Standard Model would be the observation of a particle with different quantum numbers than the ones allowed for Standard Model particles: for instance a doubly-charged particle, or a particle with spin 2. We are trying to characterize such particles and indicate the most promising signals at the colliders.

Galaxy cluster Abell 1689. Due to its large mass, it is useful for the study of dark matter and gravitational lensing. Source: European Space Agency (ESA)

Dark Matter is non-baryonic matter that interacts only weakly. But what is it? Supersymmetry provides a natural candidate in the lightest supersymmetric particle, but what about other models? We propose possible candidates for dark matter and study their interactions and the interplay between LHC signals and dedicated Dark Matter direct and indirect detection experiments.

A complete list of the publications can be found on INSPIRE.

  1. MoEDAL Collaboration, Magnetic Monopole Search with the Full MoEDAL Trapping Detector in 13 TeV pp Collisions Interpreted in Photon-Fusion and Drell-Yan Production. Phys. Rev. Lett. 123, 021802 (2019). doi:10.1103/PhysRevLett.123.021802
  2. Chatterjee, A., Frank, M., Fuks, B., Huitu, K., Mondal, S., Rai, S. K. & Waltari, H. Multileptonic signals of co-annihilating left-right supersymmetric dark matter. Phys. Rev. D 99, 035017 (2019). doi:10.1103/PhysRevD.99.035017
  3. Duan, G. H., Fan, X., Frank, M., Han, C. & Yang, J. M. A minimal U(1)′ extension of MSSM in light of the B decay anomaly. Physics Letters B 789, 54–58 (2019). doi:10.1016/j.physletb.2018.12.005
  4. Frank, M., Özdal, Ö. & Poulose, P. Relaxing LHC constraints on the WR mass. Phys. Rev. D 99, 035001 (2019). doi:10.1103/PhysRevD.99.035001
  5. Araz, J. Y., Banerjee, S., Frank, M., Fuks, B. & Goudelis, A. Dark matter and collider signals in an MSSM extension with vector-like multiplets. Phys. Rev. D 98, 115009 (2018). doi:10.1103/PhysRevD.98.115009
  6. Selbuz, L., Frank, M. & Turan, I. Higgs, chargino and neutralino mass spectra in RPV U(1)’. Il Nuovo Cimento C 40, 1–5 (2018). doi:10.1393/ncc/i2017-17198-x
  7. Araz, J. Y., Corcella, G., Frank, M. & Fuks, B. Loopholes in Z′ searches at the LHC: exploring supersymmetric and leptophobic scenarios. Journal of High Energy Physics 2018, 92 (2018). doi:10.1007/JHEP02(2018)092
  8. Frank, M. & Özdal, Ö. Exploring the supersymmetric U(1)B-L × U(1)R model with dark matter, muon g-2, and Z’ mass limits. Phys. Rev. D 97, 015012 (2018). doi:10.1103/PhysRevD.97.015012
  9. Araz, J. Y., Frank, M. & Fuks, B. Differentiating U(1)’ supersymmetric models with right sneutrino and neutralino dark matter. Phys. Rev. D 96, 015017 (2017). doi:10.1103/PhysRevD.96.015017
  10. Couture, G., Frank, M., Hamzaoui, C. & Toharia, M. Top and bottom partners, Higgs boson on the brane, and the tth signal. Phys. Rev. D 95, 095038 (2017). doi:10.1103/PhysRevD.95.095038
  11. Bahrami, S., Frank, M., Ghosh, D. K., Ghosh, N. & Saha, I. Dark matter and collider studies in the left-right symmetric model with vectorlike leptons. Phys. Rev. D 95, 095024 (2017). doi:10.1103/PhysRevD.95.095024
  12. Frank, M., Fuks, B., Huitu, K., Rai, S. K. & Waltari, H. Resonant slepton production and right sneutrino dark matter in left-right supersymmetry. Journal of High Energy Physics 2017, 15 (2017). doi:10.1007/JHEP05(2017)015
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