Category Archives: Experimental HEP News

Why Colliders Have Two Detectors

Posted on May 20, 2009 by woit

Last year the D0 collaboration at the Tevatron published a claim of first observation of an Ωb particle (a baryon containing one bottom and two strange quarks), with a significance of 5.4 sigma and a mass of 6165 +/- 16.4 … Continue reading →

Posted in Experimental HEP News | 12 Comments

Austria May Leave CERN

Posted on May 12, 2009 by woit

I mentioned this here when I first heard about it, but by now more information is available. Last Thursday the Austrian government announced their intention to withdraw from membership in CERN, effective late 2010. This decision still needs to be … Continue reading →

Posted in Experimental HEP News | 17 Comments

LHC On Schedule

Posted on May 7, 2009 by woit

A couple weeks ago I linked here to a draft LHC schedule that had about 3 weeks slippage from the previous schedule, which has beam commissioning starting again on September 21 (week 39). This was due to delays in getting … Continue reading →

Posted in Experimental HEP News | 4 Comments

Various News

Posted on April 6, 2009 by woit

The CERN Bulletin has been providing weekly updates about the progress of LHC repairs, with the latest one here. One thing they don’t seem to have mentioned is that it looks like the schedule has recently slipped by nearly a … Continue reading →

Posted in Experimental HEP News, Multiverse Mania, Uncategorized | 15 Comments

New Higgs Mass Limits

Posted on March 13, 2009 by woit

The new combined CDF/D0 Higgs mass limits are out, there’s a paper here. At a confidence level of 95%, a standard model Higgs is excluded for a mass range between 160 and 170 GeV. At a confidence level of 90%, … Continue reading →

Posted in Experimental HEP News | 9 Comments

Latest on the Higgs

Posted on March 10, 2009 by woit

The news media are full of stories about the observation at the Tevatron of “single top” production, at a rate consistent with that expected from the Standard Model. There are talks at Fermilab going on about this today, and the … Continue reading →

Posted in Experimental HEP News | 11 Comments

Chamonix For You

Posted on February 6, 2009 by woit

The 2009 Chamonix workshop on the commissioning of the LHC has just finished, ending with a message from the Director General, and the opening to the public of the web-site with slides from the meeting (bearing the warning “The Chamonix … Continue reading →

Posted in Experimental HEP News | 7 Comments

No Chamonix For You

Posted on January 30, 2009 by woit

In the last posting I linked to the web-site for next week’s LHC Performance workshop at Chamonix, where the state of efforts to recover from last September’s accident and plans for this year will be discussed. As in many previous … Continue reading →

Posted in Experimental HEP News | 21 Comments

CERN: The View From Inside

Posted on January 27, 2009 by woit

Tommaso Dorigo has a new post up on Information control from CERN, where he discusses a Physics World interview by Matthew Chalmers of the head of communications at CERN, James Gillies. Gillies addresses what CERN sees as a problem: information … Continue reading →

Posted in Experimental HEP News | 8 Comments

This and That

Posted on December 17, 2008 by woit

This week’s Nature has a nice cover story on Lyn Evans, who has been leading the construction of the LHC. The story mentions one of the problems of his high-profile job: Evans has found himself the subject of more than … Continue reading →

Posted in Experimental HEP News, Uncategorized | 27 Comments