Strongly interacting massive particle: Difference between revisions

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{{shortShort description|Hypothetical particles that interact strongly with ordinary matter, but could form the inferred dark matter despite thisparticle}}

A '''Stronglystrongly interacting massive particlesparticle''' ('''SIMPsSIMP''') areis a hypothetical particlesparticle that [[strong interaction|interactinteracts strongly]] between themselves [looks like they scatter off each other - observation of colliding galaxies in theand [[AbellWeak 3827interaction|weakly]] cluster, where it seemed that dark matter lagged behind the ordinary matter] and weakly with ordinary matter, but could form the inferred [[dark matter]] despite this.<ref name="wand">

{{For|the brown dwarf or exoplanet|SIMP J013656.5+093347}}

'''Strongly interacting massive particles''' ('''SIMPs''') are hypothetical particles that [[strong interaction|interact strongly]] between themselves [looks like they scatter off each other - observation of colliding galaxies in the [[Abell 3827]] cluster, where it seemed that dark matter lagged behind the ordinary matter] and weakly with ordinary matter, but could form the inferred [[dark matter]] despite this.<ref name="wand">

{{cite book

|last1=Wandelt |first1=Benjamin D

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|bibcode=2001sddm.symp..263W

|isbn=978-3-540-41216-8

}}</ref><ref>

}}</ref> However, this finding has since been discounted based on further observations and modelling of the cluster.<ref>

{{cite journal

|last1=Massey |first1=Richard

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|journal=Monthly Notices of the Royal Astronomical Society

|volume=477

|issue=1

|pages=669–677

|arxiv=1708.04245

|mode=cs2

|doi=10.1093/mnras/sty630

|doi-access=free

}}</ref><ref>

|bibcode=2018MNRAS.477..669M

}}</ref><ref>{{cite web

|last1=Grossman |first1=Lisa

|first1=Lisa

|date=April 5, 2018

|title=Dark matter isn't interacting with itself after all

|url=https://www.sciencenews.org/article/dark-matter-isnt-interacting-itself-after-all

|work=ScienceNews

|accessdateaccess-date=2018-04-05

|archive-date=2018-04-06

|archive-url=https://web.archive.org/web/20180406013104/https://www.sciencenews.org/article/dark-matter-isnt-interacting-itself-after-all

|url-status=live

}}</ref>

==SIMPs in the Real World==

SIMPs are difficult to track, scientists have found a cluster of SIMPs localized around Claremont High School, in Claremont, California. Scientits have nicknamed SIMP particles that they have been able to capture.

==Notable SIMPs==

SIMPs in captivity are often given nicknames. Notable SIMPs include, "Siddarth Gummadi" (See "Comedian") and Tyler McNeil. SIMP particles often enter a state where their molecular structure changes to resemble spikes or horns. Dr. Kevin Van Rodroopwaffel (NYU) dubbed this state as "vitamus hornicus", but is often referred to in the scientific community as "horny".

Strongly interacting massive particles have been proposed as a solution for the [[Ultra-high-energy cosmic ray|ultra-high-energy cosmic-ray]] problem<ref name="chung">

{{Cite journal

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|bibcode=1998PhRvD..57.4606C

|doi=10.1103/PhysRevD.57.4606

|s2cid=44780458

|mode=cs2

}}</ref><ref name="albq">

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|volume=59 |issue=1 |page=015021

|arxiv=hep-ph/9805288

|bibcode=1999PhRvD1998PhRvD..59a5021A

|doi=10.1103/PhysRevD.59.015021

|mode=cs2

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|doi=10.1103/PhysRevLett.87.061301

|pmid=11497819

|s2cid=13510283

|mode=cs2

}}</ref><ref name="chuz">

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|bibcode=2006ApJ...645..950C

|doi=10.1086/504505

|s2cid=16131656

|mode=cs2

}}</ref>

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|title=Opening the window on strongly interacting dark matter

|journal=Physical Review D

|volume=41 |issue=12 |pages=35943594–3603

|bibcode=1990PhRvD..41.3594S

|doi=10.1103/PhysRevD.41.3594

|pmid=10012303

|mode=cs2

|url=httphttps://cds.cern.ch/record/212913

}}</ref><ref name="cyb">

{{Cite journal

|last1=Cyburt |first1=Richard H

|last2=Fields |first2=Brian D

|last3=Pavlidou |first3=Vasiliki| authorlink3=Vasiliki Pavlidou

|last4=Wandelt |first4=Benjamin D

|year=2002

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|bibcode=2002PhRvD..65l3503C

|doi=10.1103/PhysRevD.65.123503

|s2cid=14926247

|mode=cs2

}}.</ref><ref name="zahar">

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|bibcode=2005PhRvD..72h3502Z

|doi=10.1103/PhysRevD.72.083502

|s2cid=39245145

|mode=cs2

}}</ref><ref name="wdn">

{{cite journal

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|chapter=Cracking Open the Window for Strongly Interacting Massive Particles as the Halo Dark Matter

|title=Proceedings of the International Cosmic Ray Conference

|journal=International Cosmic Ray Conference

|volume=4

|___location=Hamburg, Germany

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|doi=10.1086/338796

|mode=cs2

|doi-access=free

}}</ref>

SIMPsSIMP annihilations would produce significant heat. [[DAMA/NaI|DAMA]] set limits with NaI(Tl) crystals.<ref name="wdn"/>{{citation needed|date=January 2017}}

Measurements of [[Uranus]]'s heat excess exclude SIMPSSIMPs from 150 MeV to 10⁴ GeV.<ref name="mitr">

{{Cite journal

|last1=Mitra |first1=Saibal

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|bibcode=2004PhRvD..70j3517M

|doi=10.1103/PhysRevD.70.103517

|s2cid=53396770

|mode=cs2

}}</ref> Earth's heat flow significantly constrains any cross section.<ref>

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|bibcode=2007PhRvD..76d3523M

|doi=10.1103/PhysRevD.76.043523

|s2cid=119710504

|mode=cs2

}}</ref>

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*{{annotated link|Weakly interacting massive particles}}

*{{annotated link|Self-interacting dark matter}}

*{{annotated link|Massive compact halo object}}

==References==