Friday, Feb. 13, 2015

Have a safe day!

Friday, Feb. 13

2 p.m.
Future Colliders Seminar - WH10NW
Speaker: Patrick Fox, Fermilab
Title: The Relic Neutralino Surface at a 100-TeV Collider

3:30 p.m.
Director's Coffee Break - WH2XO

4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Peter Svoisky, University of Oklahoma
Title: New QCD Measurements with Charm, Beauty and Weak Bosons at DZero

Monday, Feb. 16

2 p.m.
Theoretical Physics Seminar (NOTE DATE, TIME) - Curia II
Speaker: Pilar Coloma, Fermilab
Title: Neutrino Oscillation Phenomenology at Long-Baseline Experiments


3:30 p.m.
Director's Coffee Break - WH2XO

4 p.m.
All Experimenters' Meeting - Curia II

Visit the labwide calendar to view Fermilab events

Weather Slight chance of snow

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Current Flag Status

Flags at half staff

Wilson Hall Cafe

Friday, Feb. 13

- Breakfast: chilaquiles
- Breakfast: chorizo and egg burrito
- Beer-braised bratwurst
- Roasted salmon caponata
- Steak and popcorn shrimp
- Baked ham and cheese ciabatta
- Boneless wing bar
- Leek and potato soup
- Texas-style chili
- Assorted pizza by the slice

Wilson Hall Cafe menu

Chez Leon

Friday, Feb. 13
- Mussels with white wine and thyme
- Spinach- and blue cheese-stuffed filet mignon
- Warm roasted vegetable salad
- White chocolate and raspberry creme brulee

Wednesday, Feb. 18
- Ham and gruyere crepes
- Cabbage salad
- Raspberry cheesecake

Chez Leon menu
Call x3524 to make your reservation.


Fermilab Today

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Frontier Science Result

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One minute with Steve Krave, mechanical engineer

Steve Krave works on magnetic coils in Industrial Building 2. Photo: Reidar Hahn

How long have you been at Fermilab?
I've been here about a year and a half as a regular employee.

What brought you here?
I grew up in Aurora, so this was always one of those cool places to go as a kid. Visiting was always fun, and I used to think, "Oh, that's so cool, I want to work there." Then I ended up getting a job here, which was great.

What does your typical workday look like?
We're winding big coils for detector magnets at Jefferson Lab [in Virginia]. I go around and keep an eye on everything to make sure it's all getting built as specified.

I originally got brought in to work on the impregnation process of the coils — the coil is insulated with fiberglass tape and it gets impregnated with epoxy. But then I got into keeping everything on the floor moving.

What would you consider the most exciting part of your job?
Every day is different. This is a production environment. We're turning out one of these coils about every four weeks. And we have three of them running at a time so we can get them delivered to Jefferson Lab. There's a lot of stuff going on.

What about your job do you find the most fulfilling?
I like making things. It's neat seeing something come together. The parts show up as a big pile of stuff and then become these really big magnets.

You submit photos to Fermilab Today for publication. What inspires your photography?
Photography gives you a good excuse to go out and see things. That works pretty well at Fermilab because there's always something unusual going on to take pictures of.

What is something people might not know about you?
I built my own skis, which is something I'm rather proud of.

Diana Kwon

If there's an employee, user or contractor you'd like to see profiled in Fermilab Today, please email

From symmetry

Physics valentines

In love? Or just the opposite? Express how you feel with physics-inspired valentines — and antivalentines — courtesy of symmetry. Image: Sandbox Studio with Kimberly Boustead

In the spirit of the approaching holiday, the staff of symmetry has created a set of physics-themed Valentines for you to share with the people who give you warmth and happiness. And — because we live in a universe that contains both matter and antimatter — we have also created a set of physics-themed antivalentines for you to share with the people who don't.

View the valentines

Kathryn Jepsen

Photo of the Day

Fog settles over Fermilab

Fog softens the scenery around the Main Injector. Photo: Marty Murphy, AD
In the News

First stars are 150 million years younger than thought, Planck telescope finds (+video)

From The Christian Science Monitor, Feb. 6, 2015

The cosmos's first stars appear to have formed 150 million years later than previous measurements indicated, according a new analysis of data from the European Space Agency's Planck observatory.

The earlier measurements, made by NASA's WMAP mission, put ignition of the first stars at some 400 million years after the big bang, the enormous release of energy that gave birth to the universe some 13.8 billion years ago.

This period is of keen interest because it heralded the beginning of the end for the cosmos's dark ages — a period in which the universe was brimming with neutral hydrogen gas, opaque to light. But as stars formed from the hydrogen and gathered into galaxies, these energetic structures began to ionize the hydrogen, in effect burning off the fog.

It will be sitting high on the astrophysical agenda for the next decade or so as new ground-based and space-based telescopes capable of probing this portion of cosmic history come on line, notes Scott Dodelson, an astrophysicist at the Fermi National Accelerator Laboratory in Batavia, Ill.

Read more

Frontier Science Result: CMS

Crazy particles

Scientists in the CMS collaboration look for many different possible signatures that would reveal new physical phenomena. One interesting idea is massive and long-lived particles that stop inside the detector and then decay.

"We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct."

This quote is attributed to Niels Bohr speaking to Wolfgang Pauli when the latter was presenting a new theory in a seminar, but it works equally well when modern scientists make presentations about new theories to try to push forward our understanding of the cosmos. While there is no question that the Standard Model has been an enormous success, there remain unsolved mysteries. The early successes of the LHC have stringently constrained theoretical ideas that have been put forward as possible advances in our understanding of the rules of the universe. This leads scientists to think more creatively.

One such crazy idea (but is it crazy enough?) is that there exist very heavy and stable particles that can be created only in large accelerators like the LHC. Unlike most subatomic particles, which decay in less than the blink of an eye, these particles could persist for long times, ranging from microseconds to years.

A number of theories make these predictions, and one originates in supersymmetry. All supersymmetric theories predict that there exists a set of particles that we've not yet discovered, although the different theories make quite different predictions as to the masses of these undiscovered particles.

An example of a supersymmetric theory that predicts long-lived particles is one in which the bosons have a very high mass, while the fermions have a very low mass. One of these fermions is the gluino, which is the supersymmetric analog of the gluon, a boson in the Standard Model.

There are some requirements on the decay product of the gluino. Since the gluino carries color (the charge of the strong force) it must decay into a particle that also carries color. In the Standard Model, this would be a quark. And since the gluino is a supersymmetric particle, it must also have a supersymmetric decay particle. But since its supersymmetric partner would be massive, as all supersymmetric bosons are, the gluino cannot easily decay. The net result is that, under these conditions, the gluino could live for quite a long time.

If such a particle exists and can be produced at the LHC, some of them will be produced with such a low velocity that they will interact with the CMS detector and stop moving, much as a ball rolling over a beach eventually stops. And, once stopped, the particle will eventually decay inside the detector. To be able to better identify these decays, scientists looked inside the detector in periods when no beam passed through it. Using the data, they were able to search for and set limits on long-lived particles with lifetimes ranging from a millionth of a second to more than fifteen minutes.

So we're left with the question: The theory is crazy, but is it crazy enough? Hopefully with the resumption of LHC operations later this year, we'll finally find out.

Don Lincoln

These U.S. scientists contributed to this analysis.
These physicists have made crucial contributions to the data quality monitoring for the CMS electromagnetic calorimeter.

Fermilab Chamber Series presents Callipygian Players - Feb. 15

Barn Dance - Feb. 15

Pilates registration due Feb. 16

School's Day Out - Feb. 16 and 27

Core Computing Division briefs on MS Office 2013/365 - Feb. 17

Glacier tax prep presentation - Feb. 18

No on-site prescription safety eyewear Feb. 18 and 25

Fermilab Natural Areas presents Hawk Talk - Feb. 21

English country dancing at Kuhn Barn - March 1

NALWO Puerto Rican cooking demo - March 9

URA Thesis Award competition deadline - March 20

Managing Conflict on March 24

MPS file scanning retention policy

Requests now accepted for on-site housing for summer 2015

Getting paid the greener way - get paperless pay stubs

Microsoft Office 2013 ebooks

Windows 8.1 approved for use

Fermi Singers seek new members in New Year

Need cash for college? Abri is awarding two $1,000 scholarships

Scottish country dancing Tuesday evenings at Kuhn Barn

Open gym basketball for gym members