We used to think we understood what everything was made of, from the quarks inside protons and neutrons to the stars and galaxies. We call this the Standard Model. However, over the last couple decades, it has become obvious that a class of new elementary particles (called dark matter) make up 80% of the matter in the Universe. My focus these days is trying to understand the nature of that dark matter through direct detection of it as it rains down on us here on Earth.
Exploration into the building blocks of matter through complementary approaches: (1) the most sensitive search for a direct signal from the dark matter halo surrounding our galaxy (the CDMS experiment in the Soudan Underground Laboratory in northern Minnesota), (2) the highest energy accelerator (The CMS experiment at the future Large Hadron Collider in Switzerland), and (3) the most precise measurement of the magnetic moment of the muon (g-2 at Brookhaven Lab).
Development of novel detectors for particle physics takes place in our on-site photodetector test facility. A new Low Background Counting Facility has been established at the Soudan Mine. I am also PI of an interdisciplinary collaboration called AARM - Assay and Acquisition of Radiopure Materials - which develops simulation and material screening tools for underground science.
R. Agnese et al. (SuperCDMS Collaboration), CDMSLite: Search for Low-Mass Weakly Interacting Massive Particles Using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment., Phys. Rev. Lett. 112, 041302 (2014)
P. Cushman et al., Snowmass CF1 Summary: WIMP Dark Matter Direct Detection, arXiv:1310.8327 [hep-ex] (2013)
R. Agnese et al. (CDMS Collaboration), Silicon Detector Dark Matter Results from the Final Exposure of CDMS II, Phys. Rev. Lett. 111, 251301 (2013)
S. Chatrchyan et al. (The CMS Collaboration) , Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys.Lett. B716 (2012)
Z. Ahmed et al, (CDMS Collaboration) Dark Matter Search Results from the CDMS II Experiment, Science 26 March 2010 Vol. 327. no. 5973, pp. 1619 – 1621
Z. Ahmed et al, (CDMS Collaboration) Low-threshold analysis of CDMS shallow-site data, Phys.Rev. D82:122004, 2010 arXiv:1010.4290
Z. Ahmed et al, (CDMS Experiment) Search for Axions with the CDMS Experiment, Cover Article: 2 Oct 2009 Phys. Rev. Lett.103, No.141802 (2009) arXiv:0902.4693v1
Z. Ahmed et al, (CDMS Collaboration) A Search for WIMPs with the First Five- Tower Data from CDMS, Phys. Rev. Lett. 011301 Jan 2009
G.W. Bennett et al, (Muon (g-2) Collab.) An Improved Limit on the Muon Electric Dipole Moment, Phys. Rev. D 80, 052008 (2009) arXiv:0811.1207v1 [hep-ex]
G.W. Bennett et al., Search for Lorentz and CPT violation effects in muon spin precession., Phys. Rev. Lett. (2008)
P. Cushman and B. Sherwood, Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter, NIM A - March, (2008)
G.W. Bennett et al., Statistical equations and methods applied to the precision muon (g-2) experiment at BNL, NIM A579 (2007)
P. Cushman, Low Level Counting Infrastructure and Requirements., Deep Science (NSF DUSEL Initiative) (2006) [abstract]
Bennet et al. (Muon g-2 Collaboration), Final report of the E821 muon anomalous magnetic moment measurement at BNL, Phys. Rev. D 73, 072003 (2006) [abstract]
E. Aprile, P. Cushman, K. Ni, P. Shagin, Detection of liquid xenon scintillation light with a silicon photomultiplier, Nuclear Inst. and Methods in Physics Research, A556, p.215-218 (2006) [abstract]
Akerib et al. (CDMS Collaboration), Limits on spin-dependent WIMP-nucleon interactions from the Cryogenic Dark Matter Search, Phys. Rev. D 73, 011102(R) (2006) [abstract]
Akerib et al (CDMS Collaboration), Limits on Spin-Independent Interactions of Weakly Interacting Massive Particles with Nucleons from the Two-Tower Run of the Cryogenic Dark Matter Search, Phys. Rev. Lett. 96, 011302 (2006) [abstract]
P. Cushman, Muon g-2 constraints on SUSY dark matter reviewed and predicted, New Astronomy Reviews Vol 49, Pages 125-131 (2005) [abstract]
Muon g-2 Collaboration (G.W.Bennett et al.), Measurement of the Negative Muon Anomalous Magnetic Moment to 0.7 ppm, hep-ex/0401008, Physical Review Letters 92, 161802 (2004).
P.B. Cushman and A.J.Heering, Problems and Solutions in High-rate Multi-channel Hybrid Photodiode Design: The CMS Experience, Transactions in Nuclear Science (TNS-00147-2001), IEEE Trans.Nucl.Sci.49:963-970,2002.
P. Cushman, Chapter 4. Electromagnetic and Hadronic Calorimeters, Book: "Instrumentation in High Energy Physics". edited by F. Sauli, World Scientific (1992), pp. 281-386.