Supersymmetric hybrid inflation in light of CMB experiments and swampland conjectures  

作　　者：Waqas Ahmed Shabbar Raza 

机构地区：[1]Center for Fundamental Physics and School of Mathematics and Physics,Hubei Polytechnic University,Huangshi 435003,China [2]Department of Physics,Federal Urdu University of Arts,Science and Technology,Karachi 75300,Pakistan

出　　处：《Chinese Physics C》2025年第1期114-126,共13页中国物理C(英文版)

摘　　要：In this study,we revisit supersymmetric(SUSY)hybrid inflation within the context of considering the latest Cosmic Microwave Background(CMB)observations and swampland conjectures.We demonstrate that SUSY hybrid inflation remains consistent with Planck 2018 data when radiative,soft mass,and supergravity(SUGRA)corrections are applied to the scalar potential.It is commonly perceived that SUSY hybrid inflation with a minimal Kahler potential results in a gauge symmetry breaking scale M of O(10^(15))GeV,leading to issues with the proton decay rate.In our analysis,we introduce a novel parameter space that alleviates the proton decay issue by achieving M~10^(16) GeV with M_(S)^(2)<0 and am_(3/2)>0.This scenario necessitates a soft SUSY breaking scale|M_(S)|■10^(6) GeV.Further,we find that the tensor-to-scalar ratio r spans from 10^(-16) to 10^(-6),indicating a very small value.This small ratio allows the modified swampland criteria to hold,although satisfying the trans-Planckian censorship conjecture(TCC)remains challenging.To address this,we also explo non-minimal Kahler potentials.By fixing the spectral index at n_(S)=0.9665,consistent with the central value of Planck 2018 data,and setting M=2×10^(16)GeV,we present our calculations.We show that the canonical measure of primordial gravitational waves,r,for M_(S)=1 TeV,m_(3/2)=1 TeV,and k_(S)<0 for N=1 and N=2,ranges from 10^(-5) to 0.01,rendering it detectable by Planck and upcoming experiments such as LiteBIRD,Simons Observatory,PRISM,PIXIE,CORE,CMB-S4,and CMB-HD.Additionally,we outline the parametric space and provide benchmark points for the non-minimal case to ensure compatibility with both the modified swampland conjecture and TCC.

关 键 词：suppersymmetry hybrid inflation swampland conjectures 

分 类 号：O57[理学—粒子物理与原子核物理]