Effective description of generalized disformal theories
نویسندگان
چکیده
Abstract Generalized disformal transformations enable us to construct the generalized Horndeski theories, which form most general class of ghost-free scalar-tensor theories this date. We extend effective field theory (EFT) cosmological perturbations incorporate these theories. The main difference from conventional EFT is that our extended involves operators with higher spatial derivatives lapse function. Our also accommodates transformation U-DHOST
منابع مشابه
Disformal invariance of cosmological perturbations in a generalized class of Horndeski theories
It is known that Horndeski theories can be transformed to a sub-class of GleyzesLanglois-Piazza-Vernizzi (GLPV) theories under the disformal transformation of the metric gμν → Ω(φ)gμν +Γ(φ,X)∇μφ∇νφ, where Ω is a function of a scalar field φ and Γ is another function depending on both φ and X = g∇μφ∇νφ. We show that, with the choice of unitary gauge, both curvature and tensor perturbations on th...
متن کاملSuperfield Description of Effective Theories on BPS Domain Walls
We derive the low-energy effective theory on the BPS domain wall in 4D N = 1 global SUSY theories in terms of the 3D superfields. Our derivation makes the preserved SUSY by the wall manifest and the procedure for integrating out the massive modes easier. Our procedure clarifies how the 3D superfields are embedded into the 4D chiral and vector superfields. We also point out a shortcoming of the ...
متن کاملOn the Effective Description of Dynamically Broken SUSY-Theories
We introduce a new class of effective actions describing dynamically broken supersymmetric theories in an essentially non-perturbative region. Our approach is a generalization of the known supersymmetric non-linear sigma models, but allows in contrast to the latter the description of dynamical supersymmetry breaking by non-perturbative non-semiclassical effects. This non-perturbative breaking m...
متن کاملDisformal Inflation
We show how short inflation naturally arises in a non-minimal gravity theory with a scalar field without any potential terms. This field drives inflation solely by its derivatives, which couple to the matter only through the combination ḡμν = gμν − 1 m4∂μφ∂νφ. The theory is free of instabilities around the usual Minkowski vacuum. Inflation lasts as long as φ̇ > m, and terminates gracefully once ...
متن کاملthe description of verb phrase of dezfuli dialect
شهرستان دزفول در بخش شمالغربی خوزستان با مساحت 4700 کیلومتر مربع و جمعیت 380416 (1375 ) واقع شده است . دزفولیها به گویش دزفولی تکلم می کنند ، گویشی که جز دسته جنوبی زبانهای ایرانی است . در این پایان نامه نویسنده قصد دارد گروه فعلی گویش دزفولی را توصیف کند. همچنین به بحث در باره ریشه فعلی و ستاک های مختلف ، ساخت سببی ، فعل های منظم و نامنظم ، ویژگیهای فعل مانند زمان ، وجه و نمود می پردازد در فصل...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2023
ISSN: ['1475-7516', '1475-7508']
DOI: https://doi.org/10.1088/1475-7516/2023/07/009