TY  - JOUR
AU  - Sanchis-Lozano, M. A.
PY  - 2022
DA  - 2022//
TI  - Stringy Signals from Large-Angle Correlations in the Cosmic Microwave Background?
T2  - Universe
JO  - Universe
SP  - 396 - 13pp
VL  - 8
IS  - 8
PB  - Mdpi
KW  - cosmic microwave background
KW  - angular correlations
KW  - inflation
KW  - string theory
AB  - We interpret the lack of large-angle temperature correlations and the even-odd parity imbalance observed in the cosmic microwave background (CMB) by COBE, WMAP and Planck satellite missions as a possible stringy signal ultimately stemming from a composite inflaton field (e.g., a fermionic condensate). Based on causality arguments and a Fourier analysis of the angular two-point correlation function, two infrared cutoffs k(min)(even,odd) (satisfying k(min)(even) similar or equal to 2k(min)(odd)) are introduced to the CMB power spectrum associated, respectively, with periodic and antiperiodic boundary conditions of the fermionic constituents (echoing the Neveu-Schwarz-Ramond model in superstring theory), without resorting to any particular model.
UR  - https://arxiv.org/abs/2205.13257
UR  - https://doi.org/10.3390/universe8080396
DO  - 10.3390/universe8080396
LA  - English
N1  - WOS:000845107300001
ID  - Sanchis-Lozano2022
ER  -