A new particle at Fermilab?


I am a registered reader at New York Times and subscribed Dennis Overbye‘s articles. So, this morning I received the mail from the journal with a new writing from Dennis. The title is “At Particle Lab, a Tantalizing Glimpse Has Physicists Holding Their Breaths”. I just jumped on my chair and then, eagerly, read the article. Indeed, CDF Collaboration posted a paper on arXiv last night (see here). The kind of process that they studied is the one with a final diboson (WW or WZ) from a lepton plus jets. They analyzed the invariant mass for masses higher than 100\ GeV/c^2. They get a 3\sigma excess in the region 120-160\ GeV/c^2 that, if confirmed, should correspond to a new particle. Some tests seem  to point toward a non-Standard Model particle having a mass of 150\ GeV/c^2 that cannot be identified with Higgs.

As always, it is important to emphasize the this is a 3\sigma evidence and further analysis is needed to confirm or disprove the discovery. But it is important to emphasize that Tevatron is paving the way to a large number of discoveries to be seen soon at LHC.

Update: CDF will present these results at a seminar. We can follow it on the web here.

Another update: A post by Tommaso Dorigo, one of the authors of the CDF paper, is here.

CDF Collaboration, & T. Aaltonen (2011). Invariant Mass Distribution of Jet Pairs Produced in Association with a
W boson in ppbar Collisions at sqrt(s) = 1.96 TeV arXiv arXiv: 1104.0699v1


10 Responses to A new particle at Fermilab?

  1. Hi,

    I just added my own comments to my blog. TGD based interpretation is in terms of exotic weak boson octet predicted by TGD based explanation of family replication phenomenon. Corresponding octet for gluons could explain the strange forward-backward asymmetry in ttbar production. The basic prediction is neutral flavor changing currents obeying dynamical SU(3) symmetry.

    See my posting and the earlier posting about ttbar anomaly.

    Matti Pitkanen

  2. […] than me so I don’t try to compete. See e.g. here, here and here, and now it’s also here, here, here and here . However, sometimes I like to see my plots without those fitted lines that […]

  3. Kea says:

    Thank you for your comment on Tommaso’s post. I am tired of bashing my head against the towering brick wall.

    • mfrasca says:

      Hi Kea,

      It is my due for the community I am part of and that is doing important work barely noticed mostly from the people that would need it.



  4. […] (7 abr. 2011): Más entradas sobre este tema aquí, aquí, aquí, aquí, aquí, aquí, aquí, aquí, aquí, aquí y aquí. Obviamente, al final sólo será una simple […]

  5. […] Blogs. 2. Sean Carrol, “Anomalies at Fermilab”, Cosmic Variance Blog. 3. Marco Frasca, “A new particle at Fermilab”, The Gauge Connection. 4. Adam Falkowki, “Another 3 sigma from CDF”, Resonaances Blog. […]

  6. sidharth says:

    Pending further confirmation, this new particle-force finding confirms a recent prediction of mine for high eenery particle-antiparticle system (arxiv 1103.1496; New Adv. in Physics Vol. 5, No. 1, January-June 2011, pp. 49-50)

  7. ohwilleke says:

    ” I just jumped on my chair” – this moment seems very worthy of a cartoon illustration or perhaps a photographic or video re-enactment.

  8. […] questions about LHC and the recent finding at Fermilab of a claim for a new particle discover (see here). All this makes the interview a worthwhile […]

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