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Research interests:
Cornell joined the CMS experiment at the LHC in 2005. My main involvement in CMS has been with the 66M channel pixel detector. The CMS pixel detector is placed closest to the proton-proton interaction point. The excellent spatial resolution of the pixel detector is used to reconstruct vertex positions and seed the track finding. Cornell has been the major contributor to the online software and calibration of the pixel detector. We are also involved with the commissioning and operation of the detector. I was based at CERN in 2010 and 2011 where I was deputy run coordinator for CMS in 2010 and run coordinator in 2011.
With planed increases in the luminosity of the LHC over the next decade we will have to upgrade the detectors of CMS. I'm involved with studies and R&D for upgrades to the tracking detectors. Future tracking detectors will need to provide information to the trigger, which means that some level of data reduction, e.g. by selecting high momentum tracks, is needed on the detector. We are studying different ideas for building modules with two closely spaced sensors that can provide a local correlation to allow rejection of low momentum tracks. I'n co-chair of the track trigger task force together with Marcello Mannelli. With graduate student Souvik Das I have looked at tau identification in CMS for the W to tau channel.
In addition to my work on CMS I'm a member of the CLEO collaboration. My work here has focused on the study of hadronic D and Ds decays. Precise measurements of these decays allow us to better constrain parameters of the standard model. I'm also interested in simulations of particle decays, and improving the performance of the detector by developing better techniques for calibration.
If you are interested in working on CMS with data analysis and detector R&D please contact me as I'm looking for one or more students to join this research program.
Students:
Derek Cranshaw, Ph.D. 2022 (projected)
Zhengcheng Tao, Ph.D. 2019
Benjamin Kreis, Ph.D. 2013
Thesis: Search for supersymmetry in 8
TeV proton-proton collision events with botton-quark jets and missing transverse energy. Published in
Phys. Rev. D 86, 072010 (2012) and
Phys. Lett. B 725, 243 (2013). Ben also made major contributions to the calibration and operations fo the CMS pixel detector. Ben is currently a postdoc at Fermilab.
Souvik Das, Ph.D. 2011
Thesis: Observation of the Dalitz decay Ds*+ -> Ds+ e+e-. Published in
Phys. Rev. D 86, 072005 (2012). Souvik also made major contributions to the online software for the CMS pixel detector.
Souvik is now with University of Florida working on CMS.
Steven Stroiney, Ph.D. 2008
Thesis:Measurement of the Branching Fraction For D+ -> K0L pi+. Published in
Phys. Rev. Lett. 100, 091801 (2008). Steven also made major contributions to the measurement of the D hadronic branching fractions published
in
Phys. Rev. D76, 112001 (2007) and
Phys. Rev. Lett. 95, 121801 (2005).
Now working at Sensis Corp., Syracuse, analyzing data collected at airports and working on optimization and safety systems.
Peter Onyisi, Ph.D. 2008
Thesis:Absolute Measurement of Hadronic Branching Fractions of Charmed-Strange Mesons. Published in
Phys. Rev. Lett. 100, 161804 (2008). Peter
also made major contributions to the measurement of the D hadronic branching fractions published
in
Phys. Rev. D76, 112001 (2007) and
Phys. Rev. Lett. 95, 121801 (2005).
After a postdoc at University of Chicago as Enrico Fermi Fellow working on ATLAS and CLEO-c Peter is since 2012 an assistant Prof. at UT Austin.
Hirokazu Miyake, Bs. 2006
Research project: Measurements of branching fractions for Cabibbo suppressed two-body decays of D mesons to pairs of kaons.
Published in
Phys. Rev. D77, 091106 (2008).
Now at MIT.
Selected Presentations:
2011.12.07 CMS Status Report, presentation in the open LHCC session, CERN, Switzerland
2011.07.15 Experiments desiderata, presentation at the mini-Chamonix workshop on behalf of the LHC experiments, St. Genis, France
2010.06.07 Status of CMS, presented at IPRD12, Sienna, Italy
2009.09.18 CMS Track Trigger for SLHC, presented at Vertex 2009, Putten, The Netherlands
2007.05.14 Hadronic Charm Decays, present at FPCP 2007, Slovenia
2006.06.05 CLEO-c Measurements of fD and fDs, presented at the International Workshop on tau-charm Physics, Bejing, China
2006.03.20 CLEO-c Hadronic D-decays, presented at Moriond QCD, La Thuile, Italy
2005.06.07 CLEO-c, presented at the International Conference on Weak Interactions and Neutrinos, Delphi, Greece
2005.06.06 Weak Decays, CKM, and CP Violation, presented at the International Conference on Weak Interactions and Neutrinos, Delphi, Greece
Selected Papers
Hadronic D and D_s Meson Decays, to be submitted to Review of Modern Physics (Draft)
