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Title: Fermion conformal bootstrap in 4d

Journal Article · · Journal of High Energy Physics (Online)
ORCiD logo [1];  [2];  [3];  [1]
  1. Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Physics
  2. Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
  3. National Inst. of Nuclear Physics (INFN), Trieste (Italy); International School for Advanced Studies (SISSA), Trieste (Italy)

We apply numerical conformal bootstrap techniques to the four-point function of a Weyl spinor in 4d non-supersymmetric CFTs. We find universal bounds on operator dimensions and OPE coefficients, including bounds on operators in mixed symmetry representations of the Lorentz group, which were inaccessible in previous bootstrap studies. We find discontinuities in some of the bounds on operator dimensions, and we show that they arise due to a generic yet previously unobserved “fake primary” effect, which is related to the existence of poles in conformal blocks. We show that this effect is also responsible for similar discontinuities found in four-fermion bootstrap in 3d, as well as in the mixed-correlator analysis of the 3d Ising CFT. As an important byproduct of our work, we develop a practical technology for numerical approximation of general 4d conformal blocks.

Research Organization:
Institute for Advanced Study, Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); Swiss National Science Foundation (SNSF); European Research Council (ERC); Simons Foundation
Grant/Contract Number:
SC0009988; PP00P2-163670
OSTI ID:
1596663
Journal Information:
Journal of High Energy Physics (Online), Vol. 2019, Issue 6; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Implications of ANEC for SCFTs in four dimensions journal January 2020

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