5 papers
Temperature and Moduli Independence of the Supersymmetric Index from Gravity
Raghu Mahajan, Ashoke Sen
The supersymmetric index, which gives a signed count of the microstates of black holes, can be computed directly from a gravitational path integral with appropriate boundary condit…
Instanton-Induced Closed-String Amplitudes in Minimal Superstring Theory at Subleading Order
Jyotirmoy Barman, Rishabh Kaushik, Raghu Mahajan +2
We compute the disk one-point function, the disk two-point function, and the annulus one-point function of the cosmological constant operator in the type 0A and type 0B minimal sup…
D-instanton Induced Effective Action and its Gauge Invariance
Ashoke Sen
The effect of D-instantons on closed string scattering amplitudes may be encoded into an effective action obtained by integrating out the (transient) open string fields. In order t…
String Field Theory: A Review
Ashoke Sen, Barton Zwiebach
As of today there exist consistent, gauge-invariant string field theories describing all string theories: bosonic open and closed strings, open superstrings, heterotic strings and…
On the normalization of open-closed string amplitudes
Ashoke Sen, Barton Zwiebach
We use the factorization constraints of open-closed string field theory to determine the signs and normalizations of general string amplitudes with both open and closed string exte…