Work

The Weinberg no-go theorem for cosmological constant and nonlocal gravity

Year: 2025

Type: article

Abstract: We show how a nonlocal gravitational interaction can circumvent the Weinberg no-go theorem on cosmological constant, which forbids the existence of any solution to the cosmological constant problem within the context of local field theories unless some fine-tuning is assumed. In particular, Infinite Derivative Gravity theories hint at a possible understanding of the cosmological constant as a nonlocal gravitational effect on very large scales. In this perspective, one can describe the observed cosmic acceleration in terms of an effective field theory without relying on the fine-tuning of parameters or additional matter fields.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.139370

Authors: Salvatore Capozziello, Anupam Mazumdar, Giuseppe Meluccio

Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Scuola Superiore Meridionale, University of Naples Federico II, University of Groningen

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funder: European Cooperation in Science and Technology

OpenAlex ID: W4408050270

FWCI: 2.26

Cites: 30

Cited by: 5

Related to: 10