Dipangkar Dutta, Adjunct Assistant Professor
Office Location: 010C Hilbun Hall, Mississippi State University
Office Phone: +1 662 325 3105
Email Address: dd285@msstate.edu
Web Page: http://www2.msstate.edu/~dd285
Specialties:
Experimental nuclear physics
Education:
Ph. D., Northwestern University, 1999
B. Tech., Indian Institute of Technology, Bombay, 1992
Research Categories: Experimental Nuclear Physics
Current projects: Search for oscillatory scaling behavior in exclusive processes., Search for color transparency and nuclear filtering, Electric dipole moment of the neutron
Research Description: Prof. Dutta's research is focused on precision measurement of fundamental properties of nucleons. These studies seek to understand the internal structure of hadrons in terms of the underlying quark and gluon degrees of freedom of Quantum Chromodynamics (QCD). QCD is the fundamental theory of the strong force and it has been tested extremely well in the very high energy regime, i.e., the perturbative QCD (pQCD) regime, but little is known in the non-perturbative regime where ordinary matter exists. One of the important motivations of this area of research is to understand the transition from the nucleon-meson to the quark-gluon degrees of freedom. Most of this research is carried out at Jefferson Lab (JLab) in Newport News where we undertake experiments in search of signatures of QCD in nuclei. In these experiments both polarized and unpolarized observables in exclusive processes are studied in search of signatures of QCD such as color transparency, scaling, hadron helicity conservation and nuclear filtering.
Prof. Dutta is also interested in precision tests of fundamental symmetries and the Standard Model. Three of the four fundamental forces in nature (weak, strong and electromagnetic) have been combined (unified) into one mathematically consistent quantum field theory known as the Standard Model (SM). The SM predicts or is consistent with all known aspects of the elementary particles and their interactions over an impressive range of probes and scales. My research program includes two new experiments that aim to challenge the predictions of the SM and look for physics beyond the SM. One of these experiments; The QWeak experiment proposed for JLab utilizes parity violating electron scattering from the proton to perform a precision measurement of the weak charge of the proton (QPWeak). This experiment will test the SM prediction at the 10 sigma level. Any deviation from the SM prediction would be a signal of "New physics", whereas agreement would place new and significant constraints on possible SM extensions.
The second experiment is the new search for the neutron electric dipole moment- The nEDM Experiment, which is proposed for the brand new Spallation Neutron So urce at Oak Ridge National Lab. The goal of this experiment is a factor of 100 improvement over the current experimental limit. This search for a non-zero value of the neutron EDM is a direct search for violation of the time r eversal symmetry (T). Furthermore, this experiment offers an unique opportunity to measure a non-zero value of the neutron EDM, which would imply new sources of CP violation in nature that go beyond the mechanism in the SM. New sources of C P violation have profound implications for understanding the preponderance of matter over antimatter in the universe (Baryon Asymmetry of the Universe).
Areas of Interest:
Experimental Nuclear and Particle physics
Electron scattering
Recent Publications (More Publications)
- T. Navasardyan et al., Onset of Quark Hadron Duality in Pion Electroproduction, Phys. Rev. Lett., vol. 98 (2007), pp. 022001 .
- C. Crawford et al., Measurement of the Proton's Electric to Magn etic Form Factor Ratio from 1H-vector(e-vector,e[prime]p), Phys. Rev. Lett., vol. 98 (2007), pp. 052301 .
- J. Seely, C. Crawford, B. Clasie, W. Xu, D. Dutta, and H. Gao, Laser-driven Nuclear-polarized Hydrogen Internal Gas Target, Phys. Rev. A, vol. 73 (2006), pp. 062714 .
- B.~Clasie, C.~Crawford, J.~Seely, W.~Xu, D.~Dutta, H.~Gao, Laser-driven Target of High-density Nuclear-spin Polarized Hydrogen Gas, Phys. Rev. A, vol. 73 (2006), pp. 020703(R) .
- K. Kramer et al., The Q^2 Dependence of the Neutron Spin Structure Function g2 at Low Q^2., Phys. Rev. Lett., vol. 95 (2005), pp. 142002 .