TY - JOUR
T1 - Higher order nonlinear parameters with Planck constraints
AU - Gong, Jinn Ouk
AU - Takahashi, Tomo
PY - 2014/1/21
Y1 - 2014/1/21
N2 - We investigate how higher-order nonlinear parameters affect lower-order ones through loop effects. We calculate the loop corrections up to two loops and explicitly show that the tree contribution is stable against loop terms in most cases. We argue that, nevertheless, observational constraints on nonlinear parameters such as fNL and τNL can also give a limit even for higher-order ones due to the loop contribution. We discuss these issues for both single-source and multisource cases.
AB - We investigate how higher-order nonlinear parameters affect lower-order ones through loop effects. We calculate the loop corrections up to two loops and explicitly show that the tree contribution is stable against loop terms in most cases. We argue that, nevertheless, observational constraints on nonlinear parameters such as fNL and τNL can also give a limit even for higher-order ones due to the loop contribution. We discuss these issues for both single-source and multisource cases.
UR - http://www.scopus.com/inward/record.url?scp=84894464382&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.89.023516
DO - 10.1103/PhysRevD.89.023516
M3 - Article
AN - SCOPUS:84894464382
SN - 1550-7998
VL - 89
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 2
M1 - 023516
ER -