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Title: Explaining low ℓ anomalies in the CMB power spectrum with resonant superstring excitations during inflation

Abstract

We explore the possibility that both the suppression of the = 2 multipole moment of the power spectrum of cosmic microwave background temperature fluctuations and the possible dip for = 10 –30 can be explained as well as a possible new dip for 60 as the result of the resonant creation of sequential excitations of a fermionic (or bosonic) closed superstring that couples to the inflaton field. We consider a D = 26 closed bosonic string with one toroidal compact dimension as an illustration of how string excitations might imprint themselves on the CMB. We analyze the existence of successive momentum states, winding states or oscillations on the string as the source of the three possible dips in the power spectrum. Although the evidence of these dips are of marginal statistical significance, this might constitute the first observational evidence of successive superstring excitations in Nature.

Authors:
 [1];  [2];  [3];  [4]
  1. Univ. of Notre Dame, IN (United States). Dept. of Physics. Center for Astrophysics; Saha Inst. of Nuclear Physics, Kolkata (India). Theory Division
  2. Univ. of Notre Dame, IN (United States). Dept. of Physics. Center for Astrophysics; National Astronomical Observatory of Japan, Mitaka (Japan)
  3. Nagoya Univ. (Japan). Dept. of Physics
  4. National Astronomical Observatory of Japan, Mitaka (Japan); Univ. of Tokyo (Japan). Graduate School of Science; Beihang Univ., Beijing (China). International Research Center for Big-Bang Cosmology and Element Genesis. School of Physics and Nuclear Energy Engineering
Publication Date:
Research Org.:
Univ. of Notre Dame, IN (United States); National Astronomical Observatory of Japan, Mitaka (Japan); Nagoya Univ. (Japan)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Japan Society for the Promotion of Science (JSPS)
OSTI Identifier:
1509985
Grant/Contract Number:  
FG02-95ER40934; 15H03665; 17K05459; 24340048; 18K03616; 15H05890
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 78; Journal Issue: 9; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Gangopadhyay, Mayukh R., Mathews, Grant J., Ichiki, Kiyotomo, and Kajino, Toshitaka. Explaining low ℓ anomalies in the CMB power spectrum with resonant superstring excitations during inflation. United States: N. p., 2018. Web. doi:10.1140/epjc/s10052-018-6218-x.
Gangopadhyay, Mayukh R., Mathews, Grant J., Ichiki, Kiyotomo, & Kajino, Toshitaka. Explaining low ℓ anomalies in the CMB power spectrum with resonant superstring excitations during inflation. United States. doi:10.1140/epjc/s10052-018-6218-x.
Gangopadhyay, Mayukh R., Mathews, Grant J., Ichiki, Kiyotomo, and Kajino, Toshitaka. Wed . "Explaining low ℓ anomalies in the CMB power spectrum with resonant superstring excitations during inflation". United States. doi:10.1140/epjc/s10052-018-6218-x. https://www.osti.gov/servlets/purl/1509985.
@article{osti_1509985,
title = {Explaining low ℓ anomalies in the CMB power spectrum with resonant superstring excitations during inflation},
author = {Gangopadhyay, Mayukh R. and Mathews, Grant J. and Ichiki, Kiyotomo and Kajino, Toshitaka},
abstractNote = {We explore the possibility that both the suppression of the ℓ = 2 multipole moment of the power spectrum of cosmic microwave background temperature fluctuations and the possible dip for ℓ = 10 –30 can be explained as well as a possible new dip for ℓ ≈ 60 as the result of the resonant creation of sequential excitations of a fermionic (or bosonic) closed superstring that couples to the inflaton field. We consider a D = 26 closed bosonic string with one toroidal compact dimension as an illustration of how string excitations might imprint themselves on the CMB. We analyze the existence of successive momentum states, winding states or oscillations on the string as the source of the three possible dips in the power spectrum. Although the evidence of these dips are of marginal statistical significance, this might constitute the first observational evidence of successive superstring excitations in Nature.},
doi = {10.1140/epjc/s10052-018-6218-x},
journal = {European Physical Journal. C, Particles and Fields},
number = 9,
volume = 78,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1: The fit (red line) to ℓ ≈ 2, ℓ ≈ 20 and ℓ ≈ 60 suppression of the TT CMB power spectrum as described in the text. Points with error bars are from the Planck Data Release [14]. The green line shows the best standard ΛCDM power-law fitmore » to the Planck CMB power spectrum« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.