Gregg B. Franklin Professor Ph.D., Massachusetts Institute of Technology Email: franklin@ernest.phys.cmu.edu Phone: (412) 268-2743 FAX: (412) 681-0648

Research in medium energy physics explores the boundary between nuclear and particle physics.  As part of the Carnegie Mellon University Medium Energy Group, Professor Franklin is involved in an experimental program which includes searches for new hadronic structures such as the six-quark H-Dibaryon and the study of nuclear systems containing s-quarks in addition to the u- and d-quarks found in ordinary matter.  Many of these experiments are carried out at Brookhaven National Laboratory using equipment and techniques developed at CMU.  He is also involved in the "G0 experiment" at Thomas Jefferson Laboratory in Virginia.  This ultra-high precision measurement will use the parity-violating asymmetry of the weak force to study the strange (s-quark) content of the proton.  The Medium Energy Group is currently building electronics and detector subsystems which will be used in this experiment.

Selected Publications

D.S. Armstrong, J.Arvieux, R. Asaturyan, T. Averett, et al., “Strange-quark contributions to parity-violating asymmetries in the forward G0 electron-proton scattering experiment”. Phys. Rev. Let. V95 (Aug 2005) p 092001/1-5

Ukai, M. and Ajimura, S., Akikawa, H., Alburger, D.E., et al.,  “Cascade  decay in the  _⁷L hypernucleus”, Phys. Rev. C, (Jan 2006): 12501/1-5

K.D. Paschke, B. Quinn,  A. Berdoz, G.B. Franklin, et al., “Experimental determination of the complete spin structure for   at =1.637 GeV/c”,  Phys. Rev. C (2006) 015206.

J.D. Parker, M.J.Athanas, P.D. Barnes, G. Diebold, G.B. Franklin, et al., “Weak Decay of ^4‑_He”, Phys. Rev C 76:035501 (2007).

D.S. Armstrong, J.Arvieux, R. Asaturyan, T. Averett, et al., “Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering”, Phys. Rev Lett. 99:092301 (2007).