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Brief Profile of the Awardee


Dr Sudhir Kumar Vempati

  • 2016
  • Physical Sciences
  • 10/10/1971
  • Theoretical Physics, specalising in particle physics and related areas
Award Citation:

Dr Vempati has made outstanding contributions, with the common theme of Flavour violation, which span a wide range of Particle Physics from supersymmetry to extra dimensions and from the Higgs boson to neutrino physics. His leadership qualities in developing a supersymmetric spectrum generator is highly commendable.

Academic Qualifications:
Thesis and Guide details:
Details of CSIR Fellowship/ Associateship held, if any or from other sources/ agencies.
Significant foreign assignments:
(a) Significant contributions to science and/ or technology development by the nominee based on the work done in India during most part of last 5 years:
The nominee’s scientific research contributions are mainly in the area of physics Beyond the Standard Model, which tries to embed the Standard Model of particle Physics, in to a much larger theoretical structure. The purpose of this larger theoretical structure is mainly to provide explanations of various anomalies that plague the Standard Model like neutrino masses, dark matter, etc. Two most popular theoretical structures are (a) supersymmetry and (b) extra dimensions. The nominee’s work has focused on (i) building tools that improve the testablility of supersymmetric models and their a generalizations, (ii) studying the implications of the interplay between astro-particle physics and supersymmetric models and finding new connections between apparently unrelated areas like flavor physics and dark matter and (iii) elucidating various aspects of flavor physics constraints on Randall- Sundrum Models and pointing out connections between two extra dimensional models namely, the Arkani-hamed, Dvali, Dimopoulos (ADD) models and Randall Sundrum (RS) Models. Details of the nominee’s work are given below. (i) New Directions: Flavoured Scatterings in Early Universe Most of the flavour violation observed in the laboratories is through decay processes. The early universe provides an interesting system where flavour violation in scattering processes can play an important role. This is particularly true in supersymmetric models that have a natural dark matter candidate in terms of the lightest supersymmetric particle. The relic density of the dark-matter candidate depends on the scattering cross-section with various other particles at the decoupling time. The nominee has demonstrated that Flavor violation if present in the soft sector plays an important role in modifying the scattering cross-section. The nominee has presented this idea to the case of slepton co-annihilations and has shown that flavour violating scatterings with slepton initial states or mediators can be dominant compared to their flavour conserving counter-parts. This has since been applied to the hadronic sector and different supersymmetric models by various groups. The amount of flavour violation can be arranged to be large by moving to a parameter space where low energy experimental constraints are suppressed, leading to regions that have been dubbed `flavoured co-annihilations'. SuSEFLAV: Accurate supersymmetric mass spectra, in various models of supersymmetric Breaking, is the need of the hour especially in the light of LHC data. Computation of the supersymmetric mass spectrum at high precision is a difficult task, which involves several coupled non-linear differential equations, matrix diagonalisations, loop functions, stability analysis, minimization, and iterative techniques, etc. This is typically done by huge computer programs called spectrum generators. The presently available spectrum generators however, are not suitable to handle flavour violation or non-zero neutrino masses through the seesaw mechanisms. Therefore, it is important to have such a code to deal with the current data from LHC, flavour physics, or dark matter. For example, a tiny amount of flavour violation present in the squark sector can completely remove the `strong' constraints on many supersymmetric models from the rare decay of b-quark to s-quark + photon. And more importantly, realistic models of supersymmetry breaking do predict some flavour violation in the soft terms.
(b) Impact of the contributions in the field concerned:
The work of the Nominees has received wide attention. The impact can be summarized In terms of the citation record of the Nominee. According to inSPIRE HEP database, the total number of citations of the Nominee (including published and unpublished ) is 2261 and only published in journals is 1533. His average citations per paper is 40.33, h index is 20, when considering only published work. According to Google Scholar, his total number of citations is 1854 (excluding linear collider Reports), h-index is 20, i10 index Is 30.
Places where work of last 5 years has been referred/ cited in Books, Reviews:
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The Awardee a fellow of the Indian National Science Academy/Indian Academy of Sciences/National Academy of Sciences/Others:
The Awardee delivered invited lecture(s) in India/abroad and/or chaired any scientific Internatiional Conference Symposium:
List of Awardee's 10 most significant publications.
List of Awardee's 5 most significant publications during the last 5 years
List of Awardee's 5 most significant publications from out of work done in India during the last five years:
Complete list of publications in standard refereed journals:
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List of Patents taken
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Contact Details

  • Centre for High Energy Physics
    Indian Institute of Science
    C V Raman Avenue
    Bangalore - 560 012
    Karnataka INDIA
  • vempati[at]cts[dot]iisc[dot]ernet[dot]in
29 Mar 2017, http://ssbprize.gov.in/Content/Detail.aspx?AID=515