Weakly interacting massive particle: Difference between revisions

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[[CoGeNT]], a smaller detector using a single germanium puck, designed to sense WIMPs with smaller masses, reported hundreds of detection events in 56 days.<ref name=NN-2010-02-26>{{cite journal |url=http://www.nature.com/news/2010/100226/full/news.2010.97.html |title=A CoGeNT result in the hunt for dark matter |journal=Nature |author=Eric Hand |publisher=Nature News |date=2010-02-26|doi=10.1038/news.2010.97 }}</ref><ref>{{cite journal |title=Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector |author=C. E. Aalseth |collaboration=CoGeNT collaboration |doi=10.1103/PhysRevLett.106.131301 |date=2011 |journal=Physical Review Letters |volume=106 |issue=13 |arxiv=1002.4703 |bibcode=2011PhRvL.106m1301A |pmid=21517370 |page=131301|s2cid=24822628 }}</ref> They observed an annual modulation in the event rate that could indicate light dark matter.<ref name=Dacey2011>{{cite web |last1=James Dacey |title=CoGeNT findings support dark-matter halo theory |url=http://physicsworld.com/cws/article/news/2011/jun/15/cogent-findings-support-dark-matter-halo-theory |publisher=physicsworld |date=June 2011 |access-date=5 May 2015}}</ref> However a dark matter origin for the CoGeNT events has been refuted by more recent analyses, in favour of an explanation in terms of a background from surface events.<ref>{{cite journal |last1=Davis |first1=Jonathan H. |last2=McCabe |first2=Christopher |last3=Boehm |first3=Celine |title=Quantifying the evidence for Dark Matter in CoGeNT data |journal=Journal of Cosmology and Astroparticle Physics |date=2014 |volume=1408 |issue=8 |page=014 |doi=10.1088/1475-7516/2014/08/014 |arxiv = 1405.0495 |bibcode = 2014JCAP...08..014D |s2cid=54532870 }}</ref>

Annual modulation is one of the predicted signatures of a WIMP signal,<ref>{{cite journal|last1=Drukier|first1=Andrzej K.|last2=Freese|first2=Katherine|last3=Spergel|first3=David N.|title=Detecting cold dark-matter candidates|journal=Physical Review D|date=15 June 1986|volume=33|issue=12|pages=3495–3508|doi=10.1103/PhysRevD.33.3495|pmid=9956575|bibcode=1986PhRvD..33.3495D}}</ref><ref name=Freese1988>{{cite journal |author=K. Freese |author2=J. Frieman |author3=A. Gould |title=Signal Modulation in Cold Dark Matter Detection |journal=Physical Review D |year=1988 |doi=10.1103/PhysRevD.37.3388 |pmid=9958634 |volume=37 |issue=12 |pages=3388–3405|bibcode = 1988PhRvD..37.3388F |osti=1448427 |s2cid=2610174 |url=https://semanticscholar.org/paper/d64afd44280f95754824a7696847428a38f657cd }}</ref> and on this basis the DAMA collaboration has claimed a positive detection. Other groups, however, have not confirmed this result. The CDMS data made public in May 2004 exclude the entire DAMA signal region given certain standard assumptions about the properties of the WIMPs and the dark matter halo, and this has been followed by many other experiments (see Fig 2, right).

The [[Korea Invisible Mass Search#COSINE|COSINE-100]] collaboration (a merging of KIMS and DM-Ice groups) published their results on replicating the DAMA/LIBRA signal in December 2018 in journal Nature; their conclusion was that "this result rules out WIMP–nucleon interactions as the cause of the annual modulation observed by the DAMA collaboration".<ref>{{Cite journal | doi=10.1038/s41586-018-0739-1|pmid = 30518890| title=An experiment to search for dark-matter interactions using sodium iodide detectors| journal=Nature| volume=564| issue=7734| pages=83–86| year=2018| author1=COSINE-100 Collaboration| bibcode=2018Natur.564...83C|arxiv = 1906.01791|s2cid = 54459495}}</ref> In 2021 new results from COSINE-100 and [[ANAIS-112]] both failed to replicate the DAMA/LIBRA signal<ref>{{Cite journal |last1=Amaré |first1=J. |last2=Cebrián |first2=S. |last3=Cintas |first3=D. |last4=Coarasa |first4=I. |last5=García |first5=E. |last6=Martínez |first6=M. |last7=Oliván |first7=M. A. |last8=Ortigoza |first8=Y. |last9=de Solórzano |first9=A. Ortiz |last10=Puimedón |first10=J. |last11=Salinas |first11=A. |date=2021-05-27 |title=Annual modulation results from three-year exposure of ANAIS-112 |url=https://link.aps.org/doi/10.1103/PhysRevD.103.102005 |journal=Physical Review D |language=en |volume=103 |issue=10 |pages=102005 |arxiv=2103.01175 |bibcode=2021PhRvD.103j2005A |doi=10.1103/PhysRevD.103.102005 |issn=2470-0010 |s2cid=232092298}}</ref><ref>{{Cite journal |last1=Adhikari |first1=Govinda |last2=de Souza |first2=Estella B. |last3=Carlin |first3=Nelson |last4=Choi |first4=Jae Jin |last5=Choi |first5=Seonho |last6=Djamal |first6=Mitra |last7=Ezeribe |first7=Anthony C. |last8=França |first8=Luis E. |last9=Ha |first9=Chang Hyon |last10=Hahn |first10=In Sik |last11=Jeon |first11=Eunju |date=2021-11-12 |title=Strong constraints from COSINE-100 on the DAMA dark matter results using the same sodium iodide target |journal=Science Advances |language=en |volume=7 |issue=46 |pages=eabk2699 |bibcode=2021SciA....7.2699A |doi=10.1126/sciadv.abk2699 |issn=2375-2548 |pmc=8580298 |pmid=34757778|arxiv=2104.03537 }}</ref><ref>{{Cite web |title=Is the end in sight for famous dark matter claim? |url=https://www.science.org/content/article/end-sight-famous-dark-matter-claim |access-date=2021-12-29 |website=www.science.org |language=en}}</ref> and in August 2022 COSINE-100 applied an analysis method similar to one used by DAMA/LIBRA and found a similar annual modulation suggesting the signal could be just a statistical artifact<ref>{{cite journal |last1=Adhikari |first1=G. |last2=Carlin |first2=N. |last3=Choi |first3=J. J. |last4=Choi |first4=S. |last5=Ezeribe |first5=A. C. |last6=Franca |first6=L. E. |last7=Ha |first7=C. |last8=Hahn |first8=I. S. |last9=Hollick |first9=S. J. |last10=Jeon |first10=E. J. |last11=Jo |first11=J. H. |last12=Joo |first12=H. W. |last13=Kang |first13=W. G. |last14=Kauer |first14=M. |last15=Kim |first15=B. H. |date=2023 |title=An induced annual modulation signature in COSINE-100 data by DAMA/LIBRA's analysis method |journal=Scientific Reports |volume=13 |issue=1 |page=4676 |doi=10.1038/s41598-023-31688-4 |pmid=36949218 |pmc=10033922 |arxiv=2208.05158 |bibcode=2023NatSR..13.4676A }}</ref><ref>{{Cite journal |last=Castelvecchi |first=Davide |date=2022-08-16 |title=Notorious dark-matter signal could be due to analysis error |url=https://www.nature.com/articles/d41586-022-02222-9 |journal=Nature |language=en |doi=10.1038/d41586-022-02222-9|pmid=35974221 |s2cid=251624302 }}</ref> supporting a hypothesis first put forward on 2020.<ref>{{cite journal |author=D. Buttazzo |display-authors=etal |year=2020 |title=Annual modulations from secular variations: relaxing DAMA? |journal=Journal of High Energy Physics |volume=2020 |issue=4 |page=137 |arxiv=2002.00459 |bibcode=2020JHEP...04..137B |doi=10.1007/JHEP04(2020)137 |s2cid=211010848}}</ref>