home  contact us  site map

Hadronic Physics Group (HPG)

The research program of the Hadronic Physics Group focuses on the use of the electromagnetic interaction to probe the structure of nucleons, few-nucleon systems, and complex nuclei.

The Hadronic Physics Group (HPG) conducts medium to high energy nuclear physics experiments in diverse research facilities in the world, including the Brookhaven National Laboratory (BNL), the DESY Laboratory, Thomas Jefferson National Accelerator Facility (TJNAF), The Johannes Gutenberg University of Mainz, Los Alamos National Laboratory (LANL), and the Oak Ridge National Laboratory (ORNL). The group has a leading role in the LHCb experiment at the Large Hadron Collider (LHC) at CERN.

The main topic of the group is to probe the stricture of protons, neutrons, and other hadrons in order to address a variety of questions, examples of which regard perturbative and/or non-perturbative QCD, the Standard Model of electroweak interaction and models of the early universe.


Understanding the Proton's Weak Side

QTor Magnet Spectrometer

Research from the Qweak experiment provides a precision measurement of the proton’s weak charge. narrows the search for new physics.




May 10, 2018

OLYMPUS in Nuclear Physics News International

Nuclear Physics News

Nuclear Physics News International, Volume 28, Issue 1, January - March, 2018 fea-tured an article on the OLYMPUS Experiment at DESY. This was an experiment lead by researchers from the MIT LNS Hadronic Physics Group to measure the contri-bution from two-photon exchange in lepton-proton scattering. This process is widely believed to be the cause of the striking discrepancy in the proton form factor ratio measured using polarized and unpolarized techniques. The OLYMPUS results, with results from two other experiments, measured only a small, ⟨ 1%, effect. This was less than expected from theoretical calculations but is consistent with the measure-ments in the momentum transfer regime measured. Experiments at higher energies and further theoretical work are still needed to understand the observed discrepancy in the proton form factor ratio.


May 9, 2018

Or Hen Receives 2018 Guido Altarelli Award

Or Hen

Assistant professor of physics and Laboratory for Nuclear Science researcher recognized for major contributions to high energy and nuclear physics.


April 18, 2018

Passport Systems, Inc. in February 2018 Edition of National Geographic Magazine

National Geographic February 2018 Cover

The cover article "The New Big Brother" in the February 2018 edition of National Geographic Magazine features on p. 56-57 the new cargo scanner that has been installed at the Port of Boston by Passport Systems, Inc. Further, the article mentions Bill Bertozzi and Bob Ledoux on p. 47.


February 27, 2018

LHCb (Mike Williams and collaborators) Searches for Dark Photons: Phys Rev Letters and CERN Courier

PhysRev Figure

Synopsis: LHC Sees No Dark Photons

A search for dark photons at the LHC comes up empty but puts new constraints on the strength of the hypothetical particles’ coupling to electromagnetic fields. Dark matter is aptly named. It emits no light and interacts with visible matter only via gravity. But dark matter might be only the tip of an invisible universe of unknown forces.

CERN Courier - Searches for Dark Photons at LHCb


February 8, 2018

Nuclear Physics News cover

The October-December 2017 quarterly issue of Nuclear Physics News International contains several items directly relevant to the Hadronic Physics Group. The laboratory portrait is of the MIT Bates Laboratory and is written by Bates Director Bob Redwine. The cover photo shows the Qweak toroid, which was designed, constructed and commissioned at Bates. Stanley Kowalski is co-spokesman of the Qweak collaboration. The editorial in this issue was written by Richard Milner. Finally, the issue contains an obituary for our late MIT faculty colleague Arthur Kerman by Ernie Moniz.



January 29, 2018

Charles Epstein

Charles Epstein was recently interviewed on his research which is supported by a DOE NNSA Stewardship Science Graduate Fellowship.



December 18, 2017

Blast Figure

Over twelve years after data taking with the Bates Large Acceptance Spectrometer Toroid (BLAST) was completed, a paper by the BLAST collaboration reporting on vector and tensor asymmetries in quasielastic (e,e’p) scattering from deuterium was published in the November 3, 2017 edition of Physical Review Letters. The results provide new constraints both on the spin structure of the deuteron and the role of the tensor force in the neutron-proton final-state interaction. The work was based on the Ph.D. theses of MIT students Adam DeGrush and Aron Maschinot (supervised by Robert Redwine). The principal authors of the paper were Ricardo Alarcon, Douglas Hasell and Richard Milner.



December 7, 2017

Adi Ashkenazi MIT-LNS postdoctoral researcher, Dr. Adi Ashkenazy, received the dissertation prize of the Israeli Physical Society. In her graduate work, Adi searched for new physics with the Atlas detector at the LHC. For her postdoctoral research, she is now working with Prof. Or Hen on the the ‘Electrons 4 Neutrinos’ project, analyzing data from the CLAS spectrometer at Jefferson-Lab and the MicroBooNE detector at Fermilab.


November 8, 2017

Robert P. RedwineProf. Robert P. Redwine received a Distinguished Service Award from the Division of Nuclear Physics of the American Physical Society at its recent annual meeting in Pittsburgh, PA. Prof. Redwine was recognized for his generous, dedicated service to the Division of Nuclear Physics in numerous roles spanning more than three decades and, in particular, for his thoughtful leadership of the ad hoc Funding Issues Committee, and the important role that has played in ensuring nuclear science remains a high priority for our nation.


November 8, 2017

Group picture at EINN 2017

HPG members attending EINN 2017 near Aphrodite’s Rock in Cyprus.
October 29 - November 4, 2017


 DarkLight Collaboration

 Electron-Ion Collider Users Group

 Hen Lab

 LHCb Experiment

 nEDM Experiment

 OLYMPUS Collaboration

 Qweak Collaboration

 RHIC Polarized Helium-3 Ion Source Development


Faculty and Principal Investigators

Name Phone Office Email


Research and Academic Staff

Name Phone Office Email


Administrative, Support, and Technical Staff

Name Phone Office Email



Name Phone Office Email