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Yonatan F. Kahn, Ph.D

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Yonatan F. Kahn, Ph.D. Contact Loomis Laboratory 415 E-mail: [email protected] Information Urbana, IL 61801 USA Website: yfkahn.physics.illinois.edu Research High-energy theoretical physics (phenomenology): direct, indirect, and collider searches for sub-GeV Interests dark matter, laboratory and astrophysical probes of ultralight particles Positions Assistant professor August 2019 { present University of Illinois Urbana-Champaign Urbana, IL USA Current research: • Sub-GeV dark matter: new experimental proposals for direct detection • Axion-like particles: direct detection, indirect detection, laboratory searches • Phenomenology of new light weakly-coupled gauge forces: collider searches and effects on low-energy observables • Neural networks: physics-inspired theoretical descriptions of autoencoders and feed-forward networks Postdoctoral fellow August 2018 { July 2019 Kavli Institute for Cosmological Physics (KICP) University of Chicago Chicago, IL USA Postdoctoral research associate September 2015 { August 2018 Princeton University Princeton, NJ USA Education Massachusetts Institute of Technology September 2010 { June 2015 Cambridge, MA USA Ph.D, physics, June 2015 • Thesis title: Forces and Gauge Groups Beyond the Standard Model • Advisor: Jesse Thaler • Thesis committee: Jesse Thaler, Allan Adams, Christoph Paus University of Cambridge October 2009 { June 2010 Cambridge, UK Certificate of Advanced Study in Mathematics, June 2010 • Completed Part III of the Mathematical Tripos in Applied Mathematics and Theoretical Physics • Essay topic: From Topological Strings to Matrix Models Northwestern University September 2004 { June 2009 Evanston, IL USA B.A., physics and mathematics, June 2009 • Senior thesis: Models of Dark Matter and the INTEGRAL 511 keV line • Senior thesis advisor: Tim Tait B.Mus., horn performance, June 2009 Mentoring Graduate students • Siddharth Mishra-Sharma, Princeton (Ph.D. advisor: Mariangela Lisanti) 2016{2018 • Matthew Moschella, Princeton (Ph.D. advisor: Mariangela Lisanti) 2016{2018 Undergraduate students • Cara Giovanetti, Princeton (Advisor: Mariangela Lisanti) 2018{2019 • Zachary Bogorad, MIT (Advisors: Lindley Winslow and Joseph Formaggio) 2018{2019 Honors and APS J.J. and Noriko Sakurai Dissertation Award in Theoretical Particle Physics 2016 Awards Andrew M. Lockett III Memorial Fund Award for graduate research 2014 National Science Foundation Graduate Research Fellowship 2011{2014 University of Cambridge: graduated with Distinction 2010 (highest honors in the Part III program) Churchill Scholarship for study at the University of Cambridge 2009 Northwestern University 2009 • Summa cum laude in physics and mathematics • Departmental honors and Outstanding Senior Thesis in physics • Phi Beta Kappa Centennial Prize for highest overall GPA • Phi Beta Kappa Josephine de K´arm´anFellowship 2008 Barry M. Goldwater Scholarship 2007 Publications 1. Z. Bogorad, A. Hook, Y. Kahn, and Y. Soreq. 2019. \Probing ALPs and the Axiverse with Superconducting Radiofrequency Cavities." [arXiv:1902.01418]. 2. J. Ouellet et al. 2018. \Design and Implementation of the ABRACADABRA-10 cm Axion Dark Matter Search." Phys. Rev. D99 (2019) 052012. [arXiv:1901.10652]. 3. J. Ouellet et al. 2018. \First Results from ABRACADABRA-10 cm: A Search for Sub-µeV Axion Dark Matter." Phys. Rev. Lett. 122 (2019) 8, 121802. [arXiv:1810.12257]. 4. J. Jordan, Y. Kahn, G. Krnjaic, M. Moschella, and J. Spitz. 2018. \Severe Constraints on New Physics Explanations of the MiniBooNE Excess." Phys. Rev. Lett. 122 (2019) 8, 081801 (Editor's Suggestion). [arXiv:1810.07185]. 5. J. Jordan, Y. Kahn, G. Krnjaic, M. Moschella, and J. Spitz. 2018. \Signatures of Pseudo- Dirac Dark Matter at High-Intensity Neutrino Experiments." Phys. Rev. D98 (2018) 075020. [arXiv:1806.05185]. 6. A. Hook, Y. Kahn, B. Safdi, and Z. Sun. 2018. \Radio Signals from Axion Dark Mat- ter Conversion in Neutron Star Magnetospheres." Phys. Rev. Lett. 121 (2018) 24, 241102. [arXiv:1804.03145]. 7. Y. Kahn, G. Krnjaic, N. Tran, and A. Whitbeck. 2018. \M3: A New Muon Missing Momen- tum Experiment to Probe (g − 2)µ and Dark Matter at Fermilab." JHEP 1809 (2018) 153. [arXiv:1804.03144]. 8. P. Agnes et al. 2018. \Constraints on Sub-GeV Dark Matter-Electron Scattering from the DarkSide-50 Experiment." Phys. Rev. Lett. 121 (2018) 11, 111303. [arXiv:1802.06998]. 9. P. Agnes et al. 2018. \Low-mass Dark Matter Search with the DarkSide-50 Experiment." Phys. Rev. Lett. 121 (2018) 8, 081307. [arXiv:1802.06994]. 10. Y. Hochberg, Y. Kahn, M. Lisanti, K.M. Zurek, A.G. Grushin, R. Ilan, S.M. Griffin, Z.-F. Liu, S.F. Weber, and J.B. Neaton. 2017. \Detection of sub-MeV Dark Matter with Three- Dimensional Dirac Materials." Phys. Rev. D97 (2018) 015004. [arXiv:1708.08929]. 11. E. Izaguirre, Y. Kahn, G. Krnjaic, and M. Moschella. 2017. \Testing Light Dark Matter Coan- nihilation With Fixed-Target Experiments." Phys. Rev. D96 (2017) 055007. [arXiv:1703.06881]. 12. Y. Kahn, G. Krnjaic, S. Mishra-Sharma, and T.M.P. Tait. 2016. \Light Weakly Coupled Axial Forces: Models, Constraints, and Projections." JHEP 1705 (2017) 002. [arXiv:1609.09072]. 13. Y. Hochberg, Y. Kahn, M. Lisanti, C.G. Tully, and K.M. Zurek. 2016. \Directional de- tection of dark matter with two-dimensional targets." Phys. Lett. B 772 (2017), 239-246. [arXiv:1606.08849]. 14. Y. Kahn, B.R. Safdi, and J.Thaler. 2016. \Broadband and Resonant Approaches to Axion Dark Matter Detection." Phys. Rev. Lett. 117 (2016) 14, 141801. [arXiv:1602.01086]. 15. Y. Kahn, D. Roberts, and J. Thaler. 2015. \The goldstone and goldstino of supersymmetric inflation.” JHEP 1510 (2015) 001. [arXiv:1504.05958]. 16. A. Anderson, P. Fox, Y. Kahn, and M. McCullough. 2015. \Halo-Independent Direct Detection Analyses Without Mass Assumptions." JCAP 1510 (2015) 10, 012. [arXiv:1504.03333]. 17. Y. Kahn, G. Krnjaic, J. Thaler, and M. Toups. 2014. \DAEδALUS and Dark Matter Detec- tion." Phys. Rev. D91 (2015) 055006. [arXiv:1411.1055]. 18. P. Fox, Y. Kahn, and M. McCullough. 2014. \Taking Halo-Independent Dark Matter Methods Out of the Bin." JCAP 10 (2014) 076. [arXiv:1403.6830]. 19. Y. Kahn, M. McCullough, and J. Thaler. 2013. \Auxiliary Gauge Mediation: A New Route to Mini-Split Supersymmetry." JHEP 1311 (2013) 161. [arXiv:1308.3490]. 20. Y. Kahn and J. Thaler. 2012. \Searching for an invisible A0 vector boson with DarkLight." Phys. Rev. D86 (2012) 115012. [arXiv:1209.0777]. 21. Y. Kahn and J. Thaler. 2012. \Locality in Theory Space." JHEP 1207 (2012) 007. [arXiv:1202.5491]. 22. S. Malace, Y. Kahn, W. Melnitchouk, and C.E. Keppel. 2009. “Confirmation of Quark- Hadron Duality in the Neutron F2 Structure Function." Phys. Rev. Lett. 104 (2010) 102001. [arXiv:0910.4920]. 23. Y. Kahn, W. Melnitchouk, and S. Kulagin. 2008. \New method for extracting neutron struc- ture functions from nuclear data." Phys. Rev. C79 (2009) 035205. [arXiv:0809.4308]. 24. Y. Kahn and M. Schmitt. 2008. \Electron-Dark Matter Scattering in an Evacuated Tube." [arXiv:0806.2487]. 25. Y. Kahn, M. Schmitt, and T.M.P. Tait. 2007. \Enhanced rare pion decays from a model of MeV dark matter." Phys. Rev. D78 (2008) 115002. [arXiv:0712.0007]. 26. S. Heinemeyer, Y. Kahn, M. Schmitt, and M. Velasco. 2007. \An Experiment to Search for Light Dark Matter in Low-Energy ep Scattering." [arXiv:0705.4056]. Proceedings and 1. PTOLEMY Collaboration (M.G. Betti et al). \Neutrino Physics with the PTOLEMY project." whitepapers [arXiv:1902.05508]. 2. M.G. Betti et al. 2018. \A Design for an Electromagnetic Filter for Precision Energy Mea- surements at the Tritium Endpoint." [arXiv:1810.06703]. 3. E. Baracchini et al. 2018. \PTOLEMY: A Proposal for Thermal Relic Detection of Massive Neutrinos and Directional Detection of MeV Dark Matter." Submitted to the LNGS Scientific Committee. [arXiv:1808.01892]. 4. Y. Kahn for the ABRACADABRA Collaboration. 2018. \ABRACADABRA: A Broad- band/Resonant Search for Axions." Proceeding of the 2nd International Conference on Mi- crowave Cavities and Detectors for Axion Research. Springer Proc. Phys. 211 (2018) 135-142. 5. M. Battaglieri et al. 2017. \US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report". [arXiv:1707.04591]. 6. J. Alexander et al. 2016. \Dark Sectors 2016 Workshop: Community Report." [arXiv:1608.08632]. 7. S. Alekhin et al. 2015. \A Facility to Search for Hidden Particles at the CERN SPS: the SHiP Physics Case." Rept. Prog. Phys. 79 (2016) 12, 124201. [arXiv:1504.04855]. 8. Y. Kahn. 2014. \Unbinned halo-independent methods for emerging dark matter signals." Proceedings of the Interplay between Particle and Astroparticle Physics (IPA 2014) Workshop, 18-22 August 2014, Queen Mary University of London. [arXiv:1411.4557]. 9. Y. Kahn. 2013. \Searching for an invisible dark photon with DarkLight." AIP Conf. Proc. 1563 (2013) 131-134. 10. R. Essig et al. 2013. \Dark Sectors and New, Light, Weakly-Coupled Particles." Report of the Community Summer Study 2013 (Snowmass); New, Light, Weakly Coupled Particles (NLWCP) subgroup of the Intensity Frontier. [arXiv:1311.0029]. 11. J. Balewski et al. 2013. \DarkLight: A Search for Dark Forces at the Jefferson Laboratory Free-Electron Laser Facility." Contributed to the Community Summer Study 2013 (Snow- mass); New, Light, Weakly Coupled Particles (NLWCP) subgroup of the Intensity Frontier. [arXiv:1307.4432]. 12. Y. Kahn. 2009. \Extracting neutron structure functions in the resonance region." AIP Conf. Proc. 1155 (2009) 52-60. Invited (Plenary) Interplay of Particle and Astrophysics (IPA) 2018, October 2018 conference Cincinnati, OH talks
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  • Mathematical Physics and String Theory

    Mathematical Physics and String Theory

    TIFR Annual Report 2002-03 THEORETICAL PHYSICS String Theory and Mathematical Physics Closed String Tachyon Potential Calculation The closed string 4-Tachyon amplitude in C/ZN orbifold was calculated. In an appropriate large N limit, this will throw some light on the behaviour of closed string tachyon potential in target space. [Allan Adams, Atish Dabholkar, Ashik Iqubal, Joris Raeymaekers] Compactification by Duality Twists The Scherk-Schwarz potential generated by string theory compactifications was investigated in the case of twists belonging to the duality group. For some twists, such twisted compactifications are equivalent to introducing internal fluxes. [Atish Dabholkar, Ashik Iqubal, Prasanta Tripathy, Sandip Trivedi] Duality twists, Fluxes, and Orbifolds An important problem in string theory is to generate a potential for the unwanted massless moduli fields. With this motivation, compactifications with duality twists and their relation to orbifolds and compactifications with fluxes were investigated. Inequivalent compactifications were classified by conjugacy classes of the U-duality group and resulted in gauged supergravities in lower dimensions with nontrivial potential on the moduli space. It was shown that the potential has a stable minima precisely at the fixed points of the twist group and that the theory at the minimum has an exact CFT description as an orbifold. The implications of these results for moduli stablization is under investigation. [Atish Dabholkar with Chris Hull] Tachyon Condensation in String Theory Usually F-theory duals of string theory are considered for supersymmetric backgrounds. F- theory duals of certain nonsupersymmetric backgrounds were considered that have localized tachyons. Some speculations about the endpoint of the tachyon condensation were presented based on this duality.