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Title: Theta in new QCD-like sectors

Abstract

New QCD-like “hypercolor” sectors can generate a broad class of new signatures at hadron colliders and furnish a variety of dark matter candidates. Paired diboson resonances are a particularly important collider signature, arising both from C P -conserving vector hypermeson decays of the form $$\overset{˜}{ρ}$$ → $$\overset{˜}{π}$$$\overset{˜}{π}$$ → 4 V and from C P-violating pseudoscalar hypermeson decays of the form $$\overset{˜}{η}$$ → $$\overset{˜}{π}$$$\overset{˜}{π}$$ → 4 V . The latter are sensitive to the vacuum angle ˜ θ in the hypercolor sector. We study single- and paired-diboson resonance signatures in final states involving gluons and photons at the LHC and a future 100 TeV p p collider, illustrating the discovery potential at both colliders in simple benchmark models. We also describe some of the theoretical and cosmological consequences of $$\overset{˜}{Φ}$$ . If C P-violating hypermeson decays are observable at hadron colliders, ordinary QCD must have an axion. Such scenarios also provide a natural setting for a dark pion component of dark matter, with its relic abundance set by C P-violating annihilations. If the new vacuum angle is relaxed to zero by a dark axion, the relic density can instead be a mixture of axions and dark axions. Overproduction of dark axions is most easily avoided if the Universe underwent a period of early matter domination.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1461026
Alternate Identifier(s):
OSTI ID: 1498824
Grant/Contract Number:  
[de-sc0011095; sc0011095]
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
[Journal Name: Physical Review D Journal Volume: 98 Journal Issue: 1]; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Draper, Patrick, Kozaczuk, Jonathan, and Yu, Jiang-Hao. Theta in new QCD-like sectors. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.015028.
Draper, Patrick, Kozaczuk, Jonathan, & Yu, Jiang-Hao. Theta in new QCD-like sectors. United States. doi:10.1103/PhysRevD.98.015028.
Draper, Patrick, Kozaczuk, Jonathan, and Yu, Jiang-Hao. Fri . "Theta in new QCD-like sectors". United States. doi:10.1103/PhysRevD.98.015028.
@article{osti_1461026,
title = {Theta in new QCD-like sectors},
author = {Draper, Patrick and Kozaczuk, Jonathan and Yu, Jiang-Hao},
abstractNote = {New QCD-like “hypercolor” sectors can generate a broad class of new signatures at hadron colliders and furnish a variety of dark matter candidates. Paired diboson resonances are a particularly important collider signature, arising both from C P -conserving vector hypermeson decays of the form $\overset{˜}{ρ}$ → $\overset{˜}{π}$$\overset{˜}{π}$ → 4 V and from C P-violating pseudoscalar hypermeson decays of the form $\overset{˜}{η}$ → $\overset{˜}{π}$$\overset{˜}{π}$ → 4 V . The latter are sensitive to the vacuum angle ˜ θ in the hypercolor sector. We study single- and paired-diboson resonance signatures in final states involving gluons and photons at the LHC and a future 100 TeV p p collider, illustrating the discovery potential at both colliders in simple benchmark models. We also describe some of the theoretical and cosmological consequences of $\overset{˜}{Φ}$ . If C P-violating hypermeson decays are observable at hadron colliders, ordinary QCD must have an axion. Such scenarios also provide a natural setting for a dark pion component of dark matter, with its relic abundance set by C P-violating annihilations. If the new vacuum angle is relaxed to zero by a dark axion, the relic density can instead be a mixture of axions and dark axions. Overproduction of dark axions is most easily avoided if the Universe underwent a period of early matter domination.},
doi = {10.1103/PhysRevD.98.015028},
journal = {Physical Review D},
number = [1],
volume = [98],
place = {United States},
year = {2018},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.98.015028

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Cited by: 5 works
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