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:https://doi.org/10.1103/PhysRevD.98.015028
Draper, Patrick, Kozaczuk, Jonathan, and Yu, Jiang-Hao. Fri .
"Theta in new QCD-like sectors". United States. doi:https://doi.org/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}
}
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DOI: https://doi.org/10.1103/PhysRevD.98.015028
DOI: https://doi.org/10.1103/PhysRevD.98.015028
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Works referencing / citing this record:
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