Sridhara Rao Dasu

Sridhara Rao Dasu
Born	1961 (age 64–65) Hyderabad, India
🏳️ Citizenship	Indian-American
🎓 Alma mater	Nizam College (BSc) University of Hyderabad (MSc) University of Rochester (PhD)
💼 Occupation
Known for	CMS experiment Higgs boson research BaBar experiment
🏅 Awards	Fellow of the American Physical Society (2012) Breakthrough Prize in Fundamental Physics (2025)

Sridhara Rao Dasu (born 1961) is an Indian-born American particle physicist and academic. He is a professor of physics at the University of Wisconsin–Madison and has participated in several major international high-energy physics experiments, including the CMS experiment at the Large Hadron Collider at CERN. His research focuses on experimental particle physics, including tests of the Standard Model, studies of the Higgs boson, and searches for new physics phenomena such as dark matter.

Dasu served as chair of the Department of Physics at the University of Wisconsin–Madison from 2017 to 2021. He is a Fellow of the American Physical Society.

Early life and education

Dasu was born in Hyderabad, India. He completed a Bachelor of Science degree at Nizam College, part of Osmania University, in 1981 and obtained a Master of Science in physics from the University of Hyderabad in 1983.

He moved to the United States for graduate study and received a PhD in physics from the University of Rochester in 1988. His doctoral research, supervised by physicist Arie Bodek, focused on deep inelastic scattering experiments at the Stanford Linear Accelerator Center (SLAC), which investigated the internal structure of the proton.

Career

After completing his doctorate, Dasu worked as a research associate at the Stanford Linear Accelerator Center from 1988 to 1992.

In 1992 he joined the University of Wisconsin–Madison Department of Physics as a scientist. He was appointed assistant professor (2000–2005), associate professor (2006–2009), and full professor in 2010. Dasu served as chair of the Department of Physics at the University of Wisconsin–Madison from 2017 to 2021. He has also held visiting and adjunct academic appointments, including serving as an adjunct professor at the Tata Institute of Fundamental Research in Mumbai between 2016 and 2019.

Research

Dasu's research is in experimental particle physics and focuses on testing predictions of the Standard Model and searching for phenomena beyond it using particle accelerators.

Proton structure and early experiments

Dasu's early research involved deep inelastic scattering experiments designed to probe the internal structure of the proton. These experiments measured how quarks and gluons carry momentum within the proton and helped refine theoretical descriptions of quantum chromodynamics. He contributed to fixed-target experiments at SLAC and later to experiments at the HERA accelerator at DESY, where high-energy electron–proton collisions enabled precision measurements of proton structure functions.

BaBar experiment and CP violation

Dasu later participated in the BaBar experiment at SLAC, which studied the behavior of B mesons produced in high-energy electron–positron collisions. Research conducted within the BaBar collaboration helped test predictions of the Standard Model related to quark mixing and rare particle decays.

CMS experiment and Higgs boson physics

Dasu has been involved in the CMS experiment at CERN since the early stages of the project. Dasu has contributed to measurements of electroweak processes and studies of the Higgs boson following its discovery in 2012. His research group has been involved in analyses of Higgs boson decay channels, including decays to tau leptons and four-lepton final states, which have been used to measure properties of the Higgs boson and test predictions of the Standard Model.

Searches for new physics and dark matter

Dasu has also participated in searches for physics beyond the Standard Model. These include searches for dark matter particles produced in proton–proton collisions at the Large Hadron Collider.

Detector instrumentation and computing

Within the CMS experiment Dasu has served as manager of the Level-1 calorimeter trigger system, a hardware-based system that selects potentially significant events from the millions of collisions occurring each second at the Large Hadron Collider.

Awards and honors

• Fellow of the American Physical Society (2012)
• Breakthrough Prize in Fundamental Physics with the LHC collaboration (2025)

Selected publications

• CMS Collaboration (2012). "Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC." Physics Letters B. 716 (1): 30–61.
• CMS Collaboration (2013). "Observation of a new boson with mass near 125 GeV in pp collisions at √s = 7 and 8 TeV." Journal of High Energy Physics.
• CMS Collaboration (2014). "Evidence for the direct decay of the 125 GeV Higgs boson to fermions." Physical Review Letters.
• CMS Collaboration (2018). "Observation of the Higgs boson decay to a pair of tau leptons." Physics Letters B.
• BaBar Collaboration (2001). "Observation of CP violation in the B0 meson system." Physical Review Letters.
• ZEUS Collaboration (1997). "Measurement of the proton structure function F₂ in deep inelastic scattering at HERA." European Physical Journal C.

References

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