Krishna S. Kumar

Contact Information:

W104, Physical Sciences Building

690 North Pleasant Street

University of Massachusetts

Amherst, MA 01003-9337, USA.


Email: kkumar AT umass DOT edu


Phone: 413-545-0763




A recent CV can be viewed here

A full list of publications can be viewed here


Links to Selected Publications :

  • The CREX result: "Precision Measurement of the Neutral Weak Form Factor of 48Ca, The CREX Collaboration, arXiv:2205:11593 [nucl-ex], accepted for publication in Phy.Rev.Lett.

  • The Latest Transverse Asymmetry Results: "New Measurements of the Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering over a Range of Spin-0 Nuclei, The PREX and CREX Collaborations, "arXiv:2111:04250 [nucl-ex], Phys.Rev.Lett. 128 142501 (2021)

  • The PREX2 Result: "Accurate Determination of the Neutron Skin Thickness of 208Pb through Parity-Violation in Electron Scattering" The PREX Collaboration, arXiv:1906.02723 [hep-ex], Phys.Rev.Lett. 126 172502 (2021)

  • The Final EXO-200 Result: "Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset" The EXO-200 Collaboration, arXiv:2102:10767 [nucl-ex], Phys.Rev.Lett. 123 161802 (2019)

  • The nEXO Concept: "nEXO: Neutrinoless Double Beta Decay Search Beyond 1028 Year Half-life Sensitivity" The nEXO Collaboration, arXiv:2106:16243 [nucl-ex], J.Phys.G. 49 015104 (2022)

  • Review Article "Low Energy Measurements of the Weak Mixing Angle", K. S. Kumar, S. Mantry, W.J. Marciano and P.A. Souder, arXiv:1302.6263 [hep-ex], Ann.Rev.Nucl.Part.Sci. 63 237 (2013), pdf format

  • "Characterization of Large Area APDs for the EXO-200 Detector", EXO-200 Collaboration, R. Nielson et. al, arXiv:0906.2499 [physics.ins-det], Nucl.Instrum.Meth.A608:68-75 (2009).

  • "Precision Measurements of the Nucleon Strange Form Factors at Q2 ~ 0.1 GeV2", HAPPEX Collaboration, A. Acha et. al, nucl-ex/0609002, Phys.Rev.Lett. 98:032301 (2007)

  • A Precision Measurement of the Weak Mixing Angle in Møller Scattering”, E158 Collaboration, P.L. Anthony et. al, hep-ex/0504049, Phy.Rev.Lett. 95:081601 (2005).

  • STRANGE QUARKS AND PARITY VIOLATION, K.S. Kumar (Massachusetts U., Amherst), P.A. Souder (Syracuse U.). 2000. Prog.Part.Nucl.Phys.45:S333-S395,2000, pdf format


Selected Recent Talks:

  • "How Thick is the Neutron Skin of a Heavy Nucleus?", colloquium at Michigan State University, March 2022

  • "Low Energy Probes of the Standard Model", Invited Lecture at SLAC Summer Institute (SSI2018), August 2018