Editing Tevatron (section)

==Discoveries==
The Tevatron confirmed the existence of several [[subatomic particle]]s that were predicted by [[particle physics#Theory|theoretical particle physics]], or gave suggestions to their existence. In 1995, the [[Collider Detector at Fermilab|CDF experiment]] and [[D0 experiment|DØ experiment]] collaborations announced the discovery of the [[top quark]], and by 2007 they measured its mass (172 GeV) to a precision of nearly 1%. 
In 2006, the CDF collaboration reported the first measurement of [[B-Bbar oscillation|B<sub>s</sub> oscillations]], and observation of two types of [[sigma baryon]]s.<ref>{{cite web 
|title=Experimenters at Fermilab discover exotic relatives of protons and neutrons
|url=http://www.fnal.gov/pub/presspass/press_releases/sigma-b-baryon.html
|publisher=Fermilab
|date=2006-10-23
|access-date=2006-10-23}}</ref>
In 2007, the DØ and CDF collaborations reported direct observation of the "Cascade B" ({{SubatomicParticle|Bottom Xi-}}) [[Xi baryon]].<ref>{{cite web 
|title=Back-to-Back b Baryons in Batavia
|url=http://www.fnal.gov/pub/presspass/press_releases/backtobackBaryons.html
|publisher=Fermilab
|date=2007-07-25
|access-date=2007-07-25}}</ref>

In September 2008, the DØ collaboration reported detection of the {{SubatomicParticle|Bottom Omega-}}, a "double [[strangeness|strange]]" [[Omega baryon]]  with the measured mass significantly higher than the quark model prediction.<ref>{{cite web
|title=Fermilab physicists discover "doubly strange" particle
|url=http://www.fnal.gov/pub/presspass/press_releases/Dzero_Omega-sub-b.html
|publisher=Fermilab
|date=September 3, 2008
|access-date=2008-09-04}}</ref><ref>{{cite journal
|author=V. M. Abazov ''et al.'' ([[DØ experiment|DØ collaboration]])
|year=2008
|title=Observation of the doubly strange b baryon {{SubatomicParticle|Bottom Omega-}}
|volume=101 |issue=23 |pages=231002
|journal=[[Physical Review Letters]]
|arxiv=0808.4142
|doi=10.1103/PhysRevLett.101.232002
|pmid=19113541
|bibcode = 2008PhRvL.101w2002A |s2cid=30481085
}}</ref> In May 2009 the CDF collaboration made public their results on search for  {{SubatomicParticle|Bottom Omega-}} based on analysis of data sample roughly four times larger than the one used by DØ experiment.<ref>
{{cite journal
 |author=T. Aaltonen ''et al.'' ([[CDF experiment|CDF Collaboration]])
 |year=2009
 |title=Observation of the {{SubatomicParticle|Bottom Omega-}} and Measurement of the Properties of the {{SubatomicParticle|Bottom Xi-}} and {{SubatomicParticle|Bottom Omega-}}
 |journal=[[Physical Review D]]
 |volume=80 |issue=7
 |pages=072003
 |doi=10.1103/PhysRevD.80.072003
 |arxiv=0905.3123
|bibcode = 2009PhRvD..80g2003A |s2cid=54189461
 }}</ref> The mass measurements from the CDF experiment were {{val|6054.4|6.8|u=MeV/c2}} and in excellent agreement with Standard Model predictions, and no signal has been observed at the previously reported value from the DØ experiment. The two inconsistent results from DØ and CDF differ by {{val|111|18|u=MeV/c2}} or by 6.2 standard deviations. Due to excellent agreement between the mass measured by CDF and the theoretical expectation, it is a strong indication that the particle discovered by CDF is indeed the {{SubatomicParticle|Bottom Omega-}}. It is anticipated that new data from [[Large Hadron Collider|LHC]]  experiments will clarify the situation in the near future.

On July 2, 2012, two days before a scheduled announcement at the [[Large Hadron Collider]] (LHC), scientists at the Tevatron collider from the CDF and DØ collaborations announced their findings from the analysis of around 500 trillion collisions produced since 2001: They found that the existence of the Higgs boson was likely with a mass in the region of 115 to 135 GeV.<ref>{{cite web | url=http://tevnphwg.fnal.gov/results/SM_Higgs_Summer_12/index.html | title=Updated Combination of CDF and DØ's Searches for Standard Model Higgs Boson Production with up to 10.0 fb-1 of Data | publisher=Tevatron New Phenomena & Higgs Working Group | date=June 2012 | access-date=August 2, 2012}}</ref><ref>{{cite journal | url=http://tevnphwg.fnal.gov/results/Higgs_bb_Summer_12/index.html | title=Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron | journal=Physical Review Letters | volume=109 | issue=7 | pages=071804 | date=July 2012 | access-date=August 2, 2012| bibcode=2012PhRvL.109g1804A | last1=Aaltonen | first1=T. | last2=Abazov | first2=V. M. | last3=Abbott | first3=B. | last4=Acharya | first4=B. S. | last5=Adams | first5=M. | last6=Adams | first6=T. | last7=Alexeev | first7=G. D. | last8=Alkhazov | first8=G. | last9=Alton | first9=A. | last10=Álvarez González | first10=B. | last11=Alverson | first11=G. | last12=Amerio | first12=S. | last13=Amidei | first13=D. | last14=Anastassov | first14=A. | last15=Annovi | first15=A. | last16=Antos | first16=J. | last17=Apollinari | first17=G. | last18=Appel | first18=J. A. | last19=Arisawa | first19=T. | last20=Artikov | first20=A. | last21=Asaadi | first21=J. | last22=Ashmanskas | first22=W. | last23=Askew | first23=A. | last24=Atkins | first24=S. | last25=Auerbach | first25=B. | last26=Augsten | first26=K. | last27=Aurisano | first27=A. | last28=Avila | first28=C. | last29=Azfar | first29=F. | last30=Badaud | first30=F. | display-authors=1 |collaboration=CDF, D0 | arxiv=1207.6436 | doi=10.1103/PhysRevLett.109.071804 | pmid=23006359 | s2cid=20050195 }}</ref> The statistical significance of the observed signs was 2.9 sigma, which meant that there is only a 1-in-550 chance that a signal of that magnitude would have occurred if no particle in fact existed with those properties. The final analysis of data from the Tevatron did however not settle the question of whether the Higgs particle exists.<ref name="FNAL Higgs boson results">{{cite web | url=http://www.fnal.gov/pub/presspass/press_releases/2012/Higgs-Tevatron-20120702.html | title=Tevatron scientists announce their final results on the Higgs particle | publisher=Fermi National Accelerator Laboratory | date=July 2, 2012 | access-date=July 7, 2012}}</ref><ref>{{cite magazine | url=http://www.popsci.com/technology/article/2012-07/us-scientists-almost-found-higgs-boson-time-ran-out | title=Tantalizing Signs of Higgs Boson Found By U.S. Tevatron Collider | magazine=Popular Science | date=July 2, 2012 | access-date=July 7, 2012 | author=Rebecca Boyle}}</ref> Only when the scientists from the Large Hadron Collider announced the more precise LHC results on July 4, 2012, with a mass of 125.3 ± 0.4 GeV ([[Compact Muon Solenoid|CMS]])<ref name=cms0731>{{Cite journal|author=CMS collaboration|title=Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC|journal=Physics Letters B|volume=716|issue=2012|pages=30–61|arxiv=1207.7235|date=31 July 2012|doi=10.1016/j.physletb.2012.08.021|bibcode=2012PhLB..716...30C}}</ref> or 126 ± 0.4 GeV ([[ATLAS experiment|ATLAS]])<ref name=atlas0731>{{Cite journal|author=ATLAS collaboration|title=Observation of a New Particle in the Search for the Standard Model Higgs Boson with the ATLAS Detector at the LHC|journal=Physics Letters B|volume=716|issue=2012|pages=1–29|arxiv=1207.7214|date=31 July 2012|doi=10.1016/j.physletb.2012.08.020|bibcode=2012PhLB..716....1A|s2cid=119169617 }}</ref> respectively, was there strong evidence through consistent measurements by the LHC and the Tevatron for the existence of a Higgs particle at that mass range.