## Hot Topics

### Hot topic: New results! LHCb discovers pentaquark particle

Quantum diarist Adam Davis tells us how it was done.

### Finding a five-leafed clover

Adam Davis | July 15, 2015

Photo Credit: Cathy Händel

Sometimes when you’re looking for something else, you happen across an even more exciting result. That’s what’s happened at LHCb

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## Latest Posts

### Nerds and Names

Thursday, July 16th, 2015

If there’s one thing that makes me jealous about planetary scientists, it’s how many things they get to name. They also seem to have an awful lot of fun with it. Consider these typical naming processes: Experimental particle physicists: “Jeff Weiss did an ‘availability search” of the Greek alphabet and found that the Greek letter

### Finding a five-leafed clover

Wednesday, July 15th, 2015

Sometimes when you’re looking for something else, you happen across an even more exciting result. That’s what’s happened at LHCb, illustrated in the paper “Observation of $$J/\psi p$$ resonances consistent with pentaquark states in $$\Lambda_b^0\to J/\psi K^-p$$ decays”, released on the arXiv on the 14th of July. I say this is lucky because the analysts found

### Fermilab’s flagship accelerator sets world record

Thursday, July 9th, 2015

This Fermilab press release came out on July 8, 2015. A key element in a particle-accelerator-based neutrino experiment is the power of the beam that gives birth to neutrinos: The more particles you can pack into that beam, the better your chance to see neutrinos interact in your detector. Today scientists announced that Fermilab has

### Getting teachers back on TRAC

Wednesday, July 8th, 2015

This article appeared in Fermilab Today on July 8, 2015. Bonnie Weiberg sits down in front of a small monitor in the Proton Assembly Building at Fermilab. Her job is to test the signal strength of the liquid-argon purification monitors for the proposed DUNE experiment. But Weiberg isn’t your average particle physicist. In fact she

### Why Dark Matter Exists: Believing Without Seeing

Saturday, July 4th, 2015

For decades physicists have been convinced that most of our universe is invisible, but how do we know that if we can’t see it? I want to explain the thought process that leads one to believe in a theory via indirect evidence. For those who want to see a nice summary of the evidence, check this out.

### LARP completes first successful test of High-Luminosity LHC coil

Monday, June 22nd, 2015

This article appeared in Fermilab Today on June 22, 2015. Last month, a group collaborating across four national laboratories completed the first successful tests of a superconducting coil in preparation for the future high-luminosity upgrade of the Large Hadron Collider, or HL-LHC. These tests indicate that the magnet design may be adequate for its intended

### Starting up LHC Run 2, step by step

Thursday, June 11th, 2015

I know what you are thinking. The LHC is back in action, at the highest energies ever! Where are the results? Where are all the blog posts? Back in action, yes, but restarting the LHC is a very measured process. For one thing, when running at the highest beam energies ever achieved, we have to

### In search of the secret passage

Wednesday, June 3rd, 2015

Today begins the second operation period of the Large Hadron Collider (LHC) at CERN. By declaring “stable beams”, the LHC operators signal to physicists it is now safe to turn all their detectors on. After more than two years of intensive repair and consolidation work, the LHC now operates at higher energy. What do we

### Building an instrument to map the universe in 3-D

Wednesday, May 27th, 2015

This article appeared in Fermilab Today on May 27, 2015. Dark energy makes up about 70 percent of the universe and is causing its accelerating expansion. But what it is or how it works remains a mystery. The Dark Energy Spectroscopic Instrument (DESI) will study the origins and effects of dark energy by creating the