New Particle Physics, on the way?

The PHLC2011 conference is underway with the promise of new reports from CMS and ATLAS using around 200/pb of data. The conference notes released by ATLAS so far suggest that only better exclusion limits will be found unless they are holding back some surprises. Today CMS have also shown their first paper using 190/pb from 2011 data. It also provides new exclusions.

From before the conference the main excitement came from the Tevatron where CDF have shown a 4-sigma bump at 150 GeV in decays producing W bosons and two jets. Dorigo remains firmly sceptical while Jester reports that detailed analysis of the events are consistent with a new particle just below 300 GeV that decays into a W-boson and the lighter unknown particle at 150 GeV. A study by D0 using similar data will be a crucial indicator of whether this effect is here to stay. They are expected to report on Friday at Fermilab.

Before then we will have a number of new search reports at PLHC2011, mostly on Thursday and Friday, but also today we have a special seminar from Jon Butterworth on behalf of ATLAS that just might have news (Update: It doesn’t).

So by the end of the week particle physics could look very different, and if it is all an anti-climax we just have to wait for the next big conference EPS-HEP2011 where at least 1000/pb of LHC data will be on show at the end of July. My betting is that will be the one to watch out for.


8 Responses to New Particle Physics, on the way?

  1. Saint.John says:

    (No comment – I just want to read others’ comments (notification))

  2. The new data combined with the slight evidence for 325 GeV bumps allows to make TGD based model in terms of M_89 hadron physics rater detailed.

    The surprise was that exactly the production mechanism proposed for leptopion production (leptopions are creaed in strong non-orthogonal magnetic and electric fields of colliding charges) might explain also two and half year old CDF anomaly in terms of tau-pion, DAMA observations and DAMA-Zenon100 discrepancy, and 300 GeV state decaying to W and 150 Gev state.

    If one assumes that exactly this mechanism is involved also with the production of M_89 pion as suggested by the fact that 300 particle is at rest in cm and its octaves, the ground state has mass about 73 GeV from empirical inputs, which is just 512 times the mass of ordinary pion! Quite an impressive outcome!

    Also the naive scaling for meson masses could work much better than I thought and the small indications for resonances around 3.3 TeV could correspond to charmonium states of M_89 hadron physics.

    The universality of production mechanism requires that also ordinary pion should have satellites with masses coming as octaves of pion mass. They could be produced by the proposed mechanism but not by strong interactions when center of mass energy of colliding nucleons is around octave of pion mass so that they might have remained undetected.

    See my blog: http://matpitka.blogspot.com/2011/06/simplest-identification-of-150-gev.html.

  3. Luboš Motl says:

    The LHC is starting a physics fill with 144 bpi instead of 108 bpi! 😉

    • Philip Gibbs says:

      They must be close to the next step up which requires 144 bpi.

      We want them to get as much additional data as possible over the next week before the MD/TS break starting 16th June. Anything after that will be too late for EPS-HEP. If all goes well they should have about 1/fb recorded by then.

    • carla says:

      They seem to be having so many problems with UFOs and emttance that it seemed likely they would stick with 108bpi until things are more stable. I’ve noticed they’ve shifted MD and TD a week later, so perhaps they intend to reach maximum luminosity by the end of June. With the 1/fb within reach, June will be a watershed for the LHC this year.

    • Philip Gibbs says:

      I hadn’t noticed that change, it will help

  4. Last night I managed to fix the model for lightest M_89 hadrons practically completely.

    *Color magnetic spin-spin splittings breaks naive scaling as one might expect from its quark mass dependence. By taking 147 GeV mass as input and assuming that the common mass of rho and pion in absence of splitting suffers naive scaling by factor 512, one can predict predict the masses of rho and omega (identical in good approximation).

    *The outcome is 325.6 GeV. Do and CDF have observe W+jets and two Zs around this energy so that pi, rho and omega of M_89 hadron physics might have been already observed. Also strong bounds on other meson masses are obtained.

    *There is also slight evidence for resonances at 3.3 TeV: again mass comes out almost correctly assuming naive scaling (3.1 TeV for J/Psi). Mass estimate is somewhat larger if spin-spin splitting is also now smaller than for ordinary hadrons.

    From TGD point view the situation is more or less settled already before any results from LHC. It is interesting to see how much LHC will teach about M_89 hadron spectroscopy and how long it takes before colleagues are mature to accept the situation;-).

    For the recent situation see the posting at

    http://matpitka.blogspot.com/2011/06/simplest-identification-of-150-gev.html .

  5. Philip Gibbs says:

    I am a bit disappointed not to see an update on the dimuon mass spectrum yet. Either it is too boring or too interesting.

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