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Education

Ph.D. in Physics, Brown University, 2016
- Dissertation: Search for Heavy Top Quark Partners with Charge 5/3 and Anomalous Higgs ($\to b\bar{b}$) Couplings to Vector Bosons
- Committee: Meenakshi Narain (advisor), Ulrich Heintz, David Cutts
M.Sc. in Physics, Brown University, 2013
B.Sc. in Physics, Selçuk University, 2008

Employment

Assistant Professor, Department of Physics, Karamanoğlu Mehmetbey University, 2025–present
Visiting Faculty, Department of Physics, Brown University, 2017–present
Assistant Professor, Department of Medical Techniques and Services, Karamanoğlu Mehmetbey University, 2018–2025
Research Scientist, Department of Physics, Karamanoğlu Mehmetbey University, 2017–2018
Postdoctoral Research Associate, Department of Physics, Brown University, 2016–2017
Research Assistant, Department of Physics, Selçuk University, 2008–2010

Publications

Below are the selected publications in refereed journals, for the full list see inSPIRE

CMS Collaboration Combined search for anomalous pseudoscalar HVV couplings in VH (H $\to b\bar{b}$) production and H $\to$ VV decay.
arXiv:1602.04305, Phys. Lett. B 759 (2016) 672. Link to PDF.
CMS Collaboration Search for top quark partners with charge 5/3 in proton-proton collisions at $\sqrt{s}=13$ TeV.
arXiv:1705.10967, JHEP 08 (2017) 073. Link to PDF.
CMS Collaboration Search for pair production of vector-like T and B quarks in single-lepton final states using boosted jet substructure in proton-proton collisions at $\sqrt{s}=13$ TeV.
arXiv:1706.03408, JHEP 11 (2017) 085. Link to PDF.
CMS Collaboration Search for vector-like T and B quark pairs in final states with leptons at $\sqrt{s}=13$ TeV.
arXiv:1805.04758, JHEP 08 (2018) 177. Link to PDF.
CMS Collaboration Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at $\sqrt{s}=13$ TeV.
arXiv:1810.03188, JHEP 1903 (2019) 082. Link to PDF.
CMS Collaboration Search for a charged Higgs boson decaying into top and bottom quarks in events with electrons or muons in proton-proton collisions at $\sqrt{s}=13$ TeV.
arXiv:1908.09206, JHEP 01 (2020) 096. Link to PDF.
O. Culfa, S. Sagir Plasma scale length and quantum electrodynamics effects on particle acceleration at extreme laser plasmas.
arXiv:1908.09206, Journal of Plasma Physics 87 (2021) 905870602. Link to Source.
O. Culfa, S. Sagir, I. Satilmis Study of particle acceleration by helically polarized Laguerre-Gaussian ultra intense laser plasma interactions.
arXiv:1908.09206, Plasma Phys. Control. Fusion 65 (2023) 085019. Link to Source.
CMS Collaboration Evidence for the production of four top quarks in proton-proton collisions at $\sqrt{s}=13$ TeV.
arXiv:2303.03864, Phys. Lett. B 844 (2023) 138076. Link to PDF.

Technical Notes

CMS Collaboration Search for $t\bar{t}$ resonances at the HL-LHC and HE-LHC with the Phase-2 CMS detector.
CMS Physics Analysis Summary CMS PAS FTR-18-009 (2018). Link to PDF.
CMS Collaboration Search for heavy composite Majorana neutrinos at the High-Luminosity and the High-Energy LHC.
CMS Physics Analysis Summary CMS PAS FTR-18-006 (2018). Link to PDF.
X. Cid Vidal, M. D’Onofrio, P.J. Fox, R. Torre, K.A. Ulmer, S. Sagir, et al. Beyond the Standard Model Physics at the HL-LHC and HE-LHC.
CERN-LPCC-2018-05 (2018). Link to PDF.

Conference and Workshops

S. Sagir Search for Production of Four-top Quarks in Proton-Proton Collisions at Center-of-Mass Energy of 13 TeV in the Single-Lepton Final State. Turkish Physical Society (TPS39), Bodrum, Muğla, TURKIYE, Sep 2023.
E. Usai, J. Wong, J. Hogan, M. Narain, R. Syarif, S. Sagir, U. Heintz Search for Vector-Like-Quarks T/B in Same-Sign Dilepton and Multi-lepton Final States at $\sqrt{s}=13$ TeV. DPF21, Virtual, USA, Jul 2021.
D. Li, M. Narain, E. Usai, S. Sagir Variable Importance Ranking in the CMS Search for pp to ttt in the Single Lepton Final State at a Center-of-Mass Energy of 13 TeV. DPF21, Virtual, USA, Jul 2021.
U. Heintz, D. Lee, M. Narain, N. Pervan, S. Sagir, E. Usai, W. Zhang Search for four top quark production in the single-lepton final state with the CMS data. DPF21, Virtual, USA, Jul 2021.
U. Heintz, J. Hogan, M. Narain, S. Sagir, F. Simpson Search for heavy fermionic partner of the top quark with charge 5/3 in the single leptonic channel using CMS Run 2 Data. DPF21, Virtual, USA, Jul 2021.
W. Zhang, E. Usai, S. Sagir, M. Narain, U. Heintz Search for four top quark production in the single-lepton final state with the CMS data. APS April Meeting, Virtual, USA, Apr 2021.
F. Simpson, S. Sagir, M. Narain, U. Heintz Search for heavy fermionic partner of the top quark with charge 5/3 in the single leptonic channel using CMS Run 2 data. APS April Meeting, Virtual, USA, Apr 2021.
M. Narain, S. Sagir, E. Usai, W. Zhang ttbar resonances at the HL-LHC and HE-LHC with the Phase-2 CMS detector. Upgrade Performance Studies (FTR-18-009 Approval Presentation), CERN, Geneva, SWITZERLAND, Nov 2018.
C. Barth, E. Butz, A. Korotkov, M. Narain, S. Sagir Tracker In-situ radiation monitoring. in US CMS Weekly Meeting, Fermilab, Batavia, IL, USA, Nov 2018.
S. Sagir Radiation damage measurements in CMS strip tracker. Turkish Physical Society (TPS34) International Physics Congress, Bodrum, Muğla, TURKIYE, Sep 2018.
S. Sagir Search for heavy top quark partners with charge 5e/3 in proton-proton collisions at $\sqrt{s}=13$ TeV. Turkish Physical Society (TPS34), Bodrum, Muğla, TURKIYE, Sep 2018.
S. Sagir Particle energy dependence of irradiated silicon sensor characteristics. IMSMATEC, Izmir, TURKEY, Apr 2018.
T. Bose, N. Hadley, U. Heintz, J. Hogan, M. Narain, C. Richardson, S. Sagir, D. Zou Combination of $X_{5/3}$ searches in the single-lepton and same-sign dilepton final states. CMS Central Approval Meeting (B2G-17-014 Approval Presentation), CERN, Geneva, SWITZERLAND, Feb 2018.
C. Barth, S. Sagir, CMS Tracker Collaboration CMS pixel and strip radiation damage measurements. 31st RD50 Workshop, CERN, Geneva, SWITZERLAND, Nov 2017.
C. Barth, E. Butz, M. Narain, A. Korotkov, U. Heintz, S. Sagir CMS Silicon Strip Tracker: Radiation damage monitoring leakage current plots for approval. Tracker DPG - Plot Approval Meeting, CERN, Geneva, SWITZERLAND, Jul 2017.
C. Barth, E. Butz, M. Narain, A. Korotkov, U. Heintz, S. Sagir CMS Silicon Strip Tracker: Radiation damage monitoring leakage current plots for pre-approval. Tracker DPG - Tracking POG General Meeting, CERN, Geneva, SWITZERLAND, Jun 2017.
T.Bose,U.Heintz,J.Hogan,M.Narain,C.Richardson,S.Sagir,D.Zou Search for top quark partners with charge 5/3 in the single-lepton final state at $\sqrt{s}=13$ TeV. CMS Physics Week (B2G-17-008 Approval Presentation), CERN, Geneva, SWITZERLAND, May 2017.
T. Bose, U. Heintz, J. Hogan, M. Narain, C. Richardson, S. Sagir, D. Zou Search for top quark partners with charge 5/3 in the single-lepton final state at $\sqrt{s}=13$ TeV. B2G Resonances Meeting (B2G-17-008 Pre-approval Presentation), CERN, Geneva, SWITZERLAND, Mar 2017.
R.Bhardwaj,U.Heintz,J.Hogan,J.Lee,Z.Mao,M.Narain,S.Sagir $H^{\pm} \to tb$ semileptonic. Charged Higgs Workshop, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA, Nov 2016.
S. Sagir Search for heavy top quark partners with charge 5e/3 in the single lepton final state. APS April Meeting, Salt Lake City, UT, USA, Apr 2016.
C. Barth, E. Butz, M. Narain, S. Sagir, D. Zhong CMS Silicon Strip Tracker: Radiation Damage Monitoring: Leakage Current. Tracker DPG - Tracking POG General Meeting, CERN, Geneva, SWITZERLAND, Mar 2016.
A. Avetisyan, T. Bose, U. Heintz, J. Hogan, M. Narain, C. Richardson, S. Sagir Search for heavy top quark partners with charge 5e/3 in the single lepton final state. CMS Physics Week (B2G-15-006 Lepton + Jets Approval Presentation), CERN, Geneva, SWITZERLAND, Dec 2015.
A. Avetisyan, T. Bose, U. Heintz, J. Hogan, M. Narain, C. Richardson, S. Sagir Search for heavy top quark partners with charge 5e/3 in the single lepton final state. B2G (B2G-15-006 Lepton + Jets Pre-approval Presentation), CERN, Geneva, SWITZERLAND, Nov 2015.
A. Avetisyan, T. Bose, U. Heintz, J. Hogan, M. Narain, C. Richardson, S. Sagir $X_{5/3}$ in single lepton final state. B2G/TOP Run2 Workshop, CERN, Geneva, SWITZERLAND, Oct 2015.
C. Barth, E. Butz, M. Narain, S. Sagir CMS Silicon Strip Tracker: Radiation Damage Monitoring: Leakage Current. Tracker DPG - Tracking POG General Meeting, CERN, Geneva, SWITZERLAND, Sep 2015.
N. Bower, U. Heintz, N. Khishigsuren, M. Narain, S. Sagir, E. Spencer, J. Trenado Measurements on 8” Novati Wafer. US-CMS Outer Tracker Workshop, Brown University, Providence, RI, USA, Jun 2015.
J. Berryhill, A. Garabedian, B. Kreis, J. Li, Q. Li, J.F. Low, Y. Mao, M. Narain, N. Parashar, S. Sagir, J. Stupak III, N. Tran, C. Vernieri, Q. Wang, A. Whitbeck, M. Xiao, Z. Xu Search for Anomalous HVV Couplings in VH(bb). US-CMS Annual Meeting, Cornell University, Ithaca, NY, USA, May 2015 (Invited Talk).
A. Garabedian, U. Heintz, A. Lanman, M. Narain, S. Sagir, E. Spencer, J. Trenado Sensor R&D and Testing at Brown. US-CMS Annual Meeting, Cornell University, Ithaca, NY, USA, May 2015.
S. Sagir Search for anomalous HVV couplings in associated Higgs production with H to bb. APS April Meeting, Baltimore, MD, USA, Apr 2015.
B. Asavapibhop, A. Garabedian, U. Heintz, A. Junkes, M. Narain, S. Sagir, N. Sophonrat and D. Tersegno Effect of Double Metal Layer on the Performance of CMS Silicon Sensors: A Preliminary Study. SPC2014: Siam Physics Congress, Rajamangala University of Technology Isan, Nakhon Ratchasima, Thailand, Mar 2014.
S. Sagir, Z. Mao, A. Junkes, U. Heintz, M. Narain, A. Garabedian Radiation Damage Induced by 800 MeV Protons in Silicon PAD Diodes. 22nd RD50 Workshop, Albuquerque, NM, USA, Jun 2013.
A. Garabedian, A. Junkes, U. Heintz, M. Narain, S. Sagir, Z. Mao Long-term Charge Collection Efficiency (CCE) Measurements on Multi-Geometry Strip Sensors. 22nd RD50 Workshop, Albuquerque, NM, USA, Jun 2013.
S. Sagir A Study of the Charge Collection Efficiency (CCE) of the Silicon Detectors. Turkish Physical Society 27th International Physics Congress, Istanbul, TURKIYE, Sep 2010 (Poster Presentation).