Larry Gladney

One of the deepest mysteries in physical science is the origin of the apparent accelerated expansion of the universe. The generic term given to what appears to be an "anti-gravity" for the cosmos is "dark energy". Designing the optimal experiment to explore the nature of dark energy and thereby possibly understand what it is is the goal of the SNAP collaboration. We will do this by measuring the expansion history of the universe over much of its lifetime. You can find out more about what Penn is doing on this project here.

Another of the great mysteries of the universe is the question of why any matter exists. Physicists believe that the universe was born out of the Big Bang and that it was born with equal amounts of matter and antimatter. Yet today we find essentially no primordial antimatter remaining. This is not unexpected since matter and antimatter annihilate each other, but that means that there should be little matter left as well. Certainly not enough to make galaxies with stars, planets, and people to contemplate the question. We have some ideas for how such an imbalance could have happened and they all involve one crucial ingredient: the need for nature to express a preference for matter over antimatter at a fundamental level. One goal of the BABAR collaboration is to examine this preference for one system of particles containing the bottom quark. Since this involves producing billions of such particles, another goal is to use this huge dataset to look for evidence of surprising new physics in particle decays that happen rarely. You can find out more about Penn's role on the technical aspects of BABAR here.

• 4/97, Recipient of the Edward A. Bouchet Award from the American Physical Society.
• 2/97, Martin Luther King, Jr. Lecturer Award from Wayne State University.
• 4/94, Received the Outstanding Community Service Award from the Black Graduate and Professional Students Association.
• 4/90-9/91, Awarded a Lilly Teaching Fellowship.
• 6/89-6/94, Made a Presidential Young Investigator by the National Science Foundation.
  

• Professor, University of Pennsylvania, Department of Physics and Astronomy, 2005 - present
• Associate Professor, University of Pennsylvania, Department of Physics and Astronomy, 1993 - 2005
• Assistant Professor, University of Pennsylvania, Department of Physics, 1988 – 1993
• Visiting Scholar, Lawrence Berkeley National Laboratory, 9/03 - 8/04
• Post-Doctoral Student, University of Pennsylvania, 4/85 - 7/88

• ASYMMETRIES IN B MESON DECAYS TO CHARMLESS TWO BODY STATES CONTAINING A K0.By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-10271, BABAR-PUB-03-036, Dec 2003. 8pp. Published in Phys.Rev.Lett.92:201802,2004 e-Print Archive: hep-ex/0312055
• OBSERVATION OF A NARROW MESON DECAYING TO D+(S) PI0 AT A MASS OF 2.32-GEV/C**2.By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-9711, BABAR-PUB-03-011, Apr 2003. 7pp. Published in Phys.Rev.Lett.90:242001,2003 e-Print Archive: hep-ex/0304021
• MEASUREMENT OF THE CP VIOLATING ASYMMETRY AMPLITUDE SIN 2BETA.By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-9293, BABAR-PUB-02-008, Jul 2002. 7pp. Published in Phys.Rev.Lett.89:201802,2002
• MEASUREMENT OF CP VIOLATING ASYMMETRIES IN B0 DECAYS TO CP EIGENSTATES.By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-8777, BABAR-PUB-01-01, Feb 2001. 8pp. Published in Phys.Rev.Lett.86:2515-2522,2001 e-Print Archive: hep-ex/0102030
• MEASUREMENT OF THE LIFETIME OF THE Bs0 MESON USING THE EXCLUSIVE DECAY MODE Bs0 J/y f.By CDF Collaboration (F. Abe et al.). FERMILAB-PUB-96-101-E, FERMILAB-PUB-98-173-EA, May 1996. 13pp. Published in Phys.Rev.Lett.77:1945-1949,1996
• MEASUREMENT OF THE B MESON AND b QUARK CROSS-SECTIONS AT S**(1/2) = 1.8-TeV USING THE EXCLUSIVE DECAY B0 J / y K± .Published in Phys. Rev. Lett.68:3403 (1992)
• A MEASUREMENT OF THE W BOSON MASS.By CDF Collaboration (F. Abe et al.). ANL-HEP-PR-90-71, FERMILAB-PUB-90-161-E, Aug 1990. 10pp. Published in Phys.Rev.Lett.65:2243-2246,1990
• MEASUREMENT OF THE B0 MESON LIFETIME.By S.R. Wagner et al.. SLAC-PUB-5107, LBL-27839, COLO-HEP-198, IUHEE-89-3, Nov 1989. 11pp. Published in Phys.Rev.Lett.64:1095,1990
• MEASUREMENT OF THE D0 AND D+ LIFETIMES.By Larry D. Gladney et al.. SLAC-PUB-3947, LBL-21503, May 1986. 32pp. Published in Phys.Rev.D34:2601,1986
• A SEARCH FOR SUPERSYMMETRIC ELECTRONS.By Larry D. Gladney et al.. SLAC-PUB-3178, LBL-16553, Sep 1983. 13pp. Published in Phys.Rev.Lett.51:2253,1983