Strings vs. spins on the null orbifold
Data(s) |
2014
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Resumo |
We study the null orbifold singularity in 2+1 d flat space higher spin theory as well as string theory. Using the Chern-Simons formulation of 2+1 d Einstein gravity, we first observe that despite the singular nature of this geometry, the eigenvalues of its Chern-Simons holonomy are trivial. Next, we construct a resolution of the singularity in higher spin theory: a Kundt spacetime with vanishing scalar curvature invariants. We also point out that the UV divergences previously observed in the 2-to-2 tachyon tree level string amplitude on the null orbifold do not arise in the at alpha' -> infinity limit. We find all the divergences of the amplitude and demonstrate that the ones remaining in the tensionless limit are physical IR-type divergences. We conclude with a discussion on the meaning and limitations of higher spin (cosmological) singularity resolution and its potential connection to string theory. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/51068/1/jou_hig_ene_phy_2014.pdf Kiran, Surya K and Krishnan, Chethan and Saurabh, Ayush and Simon, Joan (2014) Strings vs. spins on the null orbifold. In: JOURNAL OF HIGH ENERGY PHYSICS (12). |
Publicador |
SPRINGER |
Relação |
http://dx.doi.org/ 10.1007/JHEP12(2014)002 http://eprints.iisc.ernet.in/51068/ |
Palavras-Chave | #Centre for High Energy Physics |
Tipo |
Journal Article PeerReviewed |