Piyush Kumar

String Theory
All Roads Lead to String Theory (Polchinski)
Prior to the First Superstring Revolution
Early History	S-Matrix Theory Regge Trajectory
Bosonic String Theory	Worldsheet String Bosonic String Theory String Perturbation Theory Tachyon Condensation
Supersymmetric Revolution	Supersymmetry RNS Formalism GS Formalism BPS
Superstring Revolutions
First Superstring Revolution	GSO Projection Type II String Theory Type IIB String Theory Type IIA String Theory Type I String Theory Type H String Theory Type HO String Theory Type HE String Theory
Second Superstring Revolution	T-Duality D-Brane S-Duality Horava-Witten String Theory M-Theory Holographic Principle N=4 Super-Yang-Mills Theory AdS CFT BFSS Matrix Theory Matrix String Theory (2,0) Theory Twistor String Theory F-Theory String Field Theory Pure Spinor Formalism
After the Revolutions
Phenomenology	String Theory Landscape Minimal Supersymmetric Standard Model String Phenomenology

Piyush Kumar is a String Theorist at the Yale University who works in String Phenomenology.^[1] He has recently been working in the properties of the string theory vacua, specifically the implications in particle physics, such as the prediction of the Higgs mass.^[2]

In March 2013, the LHC had observed the Higgs at the ATLAS and CMS experiments, at a mass of $ 125 \frac{\operatorname{ GeV}}{c_0^2} $. Thus, the classes of String Theory Vacua which predict a drastically different Higgs mass are ruled out, narrowing down the String Theory Landscape.

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