Experimental Particle Physics

As an experimental physicist, I am most interested in finding the answers to fundamental questions about the elementary fabric of matter and the state of the early universe. We know that the Standard Model of particle physics provides an accurate description of the fundamental particles and their interactions. The electroweak processes that are beautifully calculable at all levels. Quantum Chromodynamics (QCD) describes the strong interaction processes well at high energies. However, we know that the Standard Model of particle physics must be incomplete, since nuclear matter composes less than five percent of the universe. To look for physics beyond the Standard Model involves searching for new particles and symmetries in nature, and it is the most important reason why the Large Hadron Collider (LHC) is still operated at the CERN Laboratory in Geneva, Switzerland.

         My accomplishments during my career, have involved physics and hardware. I contributed considerably to the recent LHC discoveries is the B-meson decays. I re-modified the muon trigger filters of measuring branching fraction for B_sà μ⁺ μ⁻  decays. The branching ratio is very small in the Standard Model so any signal would indicate physics beyond the Standard Model. Previously I was involved in measuring properties of the top quark. These measurements could very well be the key to a deeper understanding of fundamental particle interactions. Working with the Rice group we have contributed to a number of different measurements such as: the tt production cross-section, top quark mass measurement and the W-helicity fractions from the tt semileptonic decays.

J. Brooke, on behalf of the CMS Collaboration "“Performance of the CMS Level-1 Trigger” arXiv:1302.2469v1 [hep-ex] 11 Feb 2013." 

Serguei Chatrchyan (Yerevan Phys. Inst.) et al.[CMS Collaboration] "“Measurement of the Bs to μ+ μ− branching fraction and search for B0 to μ+ μ− with the CMS Experiment” Phys. Rev. Lett. 111 (2013) 101804.." 

Serguei Chatrchyan (Yerevan Phys. Inst.) et al.[CMS Collaboration] "Measurement of the tt Production Cross Section in pp Collisions at s=7 TeV using the Kinematic Properties of Events with Leptons and Jets.Eur. Phys. J. C 71 (2011) 1721 CMS-TOP-10-002 (2011-06-05)." 

S Chatrchyan (Yerevan Phys. Inst.) et al.[CMS Collaboration] "Performance of the CMS Level-1 Trigger during Commissioning with Cosmic Ray Muons 2010 JINST 5 T03002." 

[ CMS Collaboration] "“Synchronization of CSC Trigger Primitives Arriving at the CSC Track Finder” CMS IN-2009/021." 

N.E.Adam et al. "“Absolute Branching Fraction Measurements for D+ and Do Inclusive Semileptonic Decays” Phys. Rev. Lett 97,251801 (2006).." 

[CMS Collaboration] ""Measurement of the W boson polarization in semileptonic top pair decays with the CMS detector at the LHC." CMS PAS TOP-11-020 (2012) ." 

D.Acosta, G.P.Di Giovanni, D.Holmes, A.Madorsky, M.Matveev, P.Padley, L.Redjimi, L.Uvarov,D.Wang "Commissioning of the CSC Level 1 Trigger Optical Links at CMS ." 

J. Brooke On behalf of the CMS Collaboration "“Development and Performance of the CMS High Level trigger for 2010/2011 and 2011/2012 data at 7 and 8 TeV”." 

[CMS Collaboration] "“Measurement of the top quark mass in the l+jets channel” CMS-PAS-TOP-10-009." 

"APS Meeting, Denver, Colorado
Talk: “Preliminary branching fractions and spectra shapes for the decays D+ → Xlν and Do → Xlν, using the CLEO-c detector at the CESR e+e− collider are presented. ." (April 2004)

"CMS Physics Week, Bodrum, Turkey
“To review and discus CMS physics”."

"CMS Week, CERN, Switzerland"
Talk: “Run Control and Monitor System (RCMS) and Error Reporting." (February 2008)

"CMS Week, CERN, Switzerland"
Talk: “Run Control and Monitor System Status and Plan." (December 2007)

"CMS Week, CERN, Switzerland
“To discus the Bs to mu mu analysis”." (July 2013)

"Rice University, Houston, TX"
“Future Faculty Workshop."

"Trigger Review, CERN, Switzerland"

Talk: “Top High Level Trigger Menu for high Luminosity." (February 2011)