JLab Weekly - Nov. 20, 2019

Jefferson Lab Weekly Banner
  • 3-Pion Decays
  • CLAS Meeting Recap
  • Science Fair Judges
  • Review Exemptions
  • United Way - Last Ask
  • United Way - Apple Watch
  • Decorating Contest
  • Children's Holiday Party
  • Pet Donations
  • Spotlight on L. Loewus
Nov. 20 2019
Image of Camille Ginsburg
Women @ Energy: Camille Ginsburg
The director of accelerator operations shares what it's like to work in physics, ways to engage more women in STEM and more. Read her Department of Energy Women @ Energy profile here.
Theoretical & Computational Physics Banner
A new JPAC (Joint Physics Analysis Center) paper generalizes the Khuri-Treiman formalism for 3-body decays to the decays of particles with the arbitrary quantum numbers: spin, isospin, parity, charge conjugation. The formalism allows amplitudes to be constructed that are free of kinematical singularities and satisfy crossing symmetry. The customary expansion of these amplitudes into an infinite sum of partial waves is replaced by three finite sums (one for each of the st, and u channels) of isobars, which only carry a right-hand cut discontinuity.

Experimental Nuclear Physics Banner
Last week, the lab hosted more than one hundred researchers from the CLAS Collaboration. Progress in data analysis was shown and a path forward to the first publication of CLAS12 results were discussed. The collaboration is actively analyzing electroproduction data on hydrogen and deuteron targets. Preliminary results concerning DVCS, SIDIS and some spectroscopy analysis demonstrated the potentialities, as well as the rich physics program of CLAS12.

Plans and preparation for the upcoming runs include the continuation of data taking on deuteron, solid target tests and the special installation of the low energy proton-recoil detector BONUS. The collaboration is preparing to analyze the statistics collected so far including, progress in data processing and latest improvements in AI-supported reconstruction algorithms, as well as development in the use of external computing resources were presented.

External experts provided interesting talks on jet physics (B. Jacak - Berkeley), future plans to install a Helium-3 polarized target in CLAS12 (R. Milner - MIT), and high performing computing in hadron physics (D. Richards - JLab). To view the slides shared during the meeting, click here.

Science Education Banner
Have a little fun and use your expertise to be a science fair judge for area high schools! There are two opportunities to judge:
  • Annual Science and Technology Fair - Friday, Dec. 6, from 8 a.m.-1 p.m., at Denbigh High School in Newport News.
  • Williamsburg Science Fair - Friday, Jan. 10, from 3-5 p.m., Jamestown High School in Williamsburg. 

If you are interested in judging in either of these science fairs, please contact Carol McKisson at x7560.

Finance Banner
As we approach the end of the year, the Finance Department would like to remind you that now is the time to review any withholding exemptions you may have. If you have had a change in circumstances since you last filed a Form W-4, Employee’s Withholding Allowance Certificate, you should update your allowances by filing a new Form W-4. 

Status changes include:
  • marriage or divorce.
  • birth of a child.
  • loss of a dependent.
  • change in tax exempt status.

If you need to file a new form, you can do this through the Time & Expense/Employee Self-Service (ESS) system or you can fill out a paper form and submit it to Payroll. The paper forms are available through Insight, from the IRS website and in the SSC, outside of room 18. To read the full memo, click hereIf you have any questions, email timesheet@jlab.org

Training Banner
Have you ever wondered how angel investing works or how to find an angel investor? Monique Adams, executive director of 757 Angels, a regional venture capital network, will be speaking as part of the Internal Inventor Academy Series on Nov. 26, at 11 a.m., in CEBAF Center room F113. 757 Angels is a network of more than 100 business and community leaders in Hampton Roads, who provide investment capital, strategic advice and mentoring to selected startup and early-stage companies to help them achieve market leadership. Inventors, entrepreneurs and other members of the Jefferson Lab community who want to understand more about angel investing and its role in technology commercialization and transfer are welcome to attend. For questions, contact Deborah Dowd at x7180.


General Announcements Banner
Although we reached the scheduled end of our annual United Way campaign, the directorate would like to make one final appeal to encourage you to support this worthy cause. The following are some reasons why your donation matters so much this year:

  • One hundred percent of your contribution benefits the community directly. All of the United Way Virginia Peninsula overhead is covered by a generous donation from the area’s largest employer, Huntington Ingalls Industries.
  • Our community needs our help. You do not have to look hard to see the need; 12% of local families live in poverty, and another 32% are working hard but don’t qualify for government assistance, resulting in daily living struggles.
  • Jefferson Lab receives tremendous support from our community. Our community is rightfully proud to have a world-leading scientific research facility based right here, and they have done much to support our growth. As is often said “to whom much is given, much is expected in return,” and contributing to the United Way is a visible sign of our appreciation for this support.

There is still time to make a difference. To contribute, click here. To read the full memo, click here.

The Apple Watch is still up for grabs! If you have ticket number 8195598, please claim your prize. If this prize is not claimed, we will redraw and announce the new winner in the Nov. 27 edition of the Weekly Briefs.
  • Apple Watch - 8195438

Contact Krystina Patrick at x7628 to coordinate a time to pick up your prize. You must present the winning ticket to collect your prize. Thank you to everyone who has supported or plan to support the United Way campaign by participating in the picnic, raffle and art contest!


Door Decorating ContestWho has holiday spirit? We do! If you've been playing Mariah Carey's "All I Want for Christmas" holiday anthem since Halloween, then this contest was made for you! Decorate your cube or door to ring in the holiday season this year. Decorating kicks off on Monday, Dec. 2, and will be on display throughout the month of December. After you put the finishing touches on your masterpiece, let Jefferson Lab Activities Group (JAG) chair Dan Moore know before Monday, Dec. 16, to be entered into the contest.

Prizes will be awarded for the Best Overall, Most Original and Geekiest themes. Please refrain from open flames or unwrapped food-based items in your decor as no one likes fire or critters. Happy decorating! For questions, contact Dan Moore at x5927.

Children celebratingThe JAG is searching for elves to help facilitate holiday joy during the annual Children's Holiday Party, Saturday, Dec. 7, from 10 a.m.-1 p.m. Shifts are only an hour long leaving you plenty of time to join in on the fun of the day. Whether you want to serve as a bounce house safety elf or supervise the holiday crafting table, JAG needs your help to keep the magic alive!

Guests will be able to enjoy crafts, games, balloons, face painting, a bounce house and more inside CEBAF Center! Sip on warm beverages and enjoy scrumptious food to kick off your holiday season. The big man himself will make an appearance with a photographer on-site to capture those life-long memories with Santa. Per holiday tradition, the U.S. Marines will pick up all Toys for Tots donations. Please place all unwrapped, unused toys in any of the collection boxes located across the lab. To volunteer for a shift, click here.

If you are interested in joining the JAG committee, contact Dan Moore at x5927.

Image of petsMeow! For another year running, the ESH&Q safety wardens are collecting pet food or other pet items to donate to the Peninsula SPCA shelter during the holiday season.

You'll find boxes in the ESH&Q lobby, CEBAF Center lobby, TED lobby, MCC lobby, SSC lobby and the Test Lab break room. Spread a little holiday cheer with the fuzziest among us. Pet food, treats, food bowls, collars, leashes, flea collars and kitty litter are much-needed items. The boxes will be collected Wednesday, Dec. 11.

For questions, contact Tina Menefee at x5490.

Employee Spotlight Banner
Lisa Loewus"I have many skills which I can attribute to learning from the military," said Lisa Loewus. "Leading, attention to detail and valuing your teammates for what they bring to the table are just a few things."

Lisa served as a Hospital Corpsman with a specialty of Pharmacy Technician in the Navy from 1989 to 1995 then in the Navy Reserves from 1995 to 1997. She started her career at Jefferson Lab in 2019 and now works as a Project Control Analyst for the Program Management Office.

Read her Employee Spotlight here.


JLab Weekly provides information on the status of safety, accelerator operations, experiments, reviews, upcoming activities and special events. Have something you want to see in the Weekly? Send submissions to Rebecca Duckett at duckett@jlab.org.

Nov. 11 - Nov. 18, 2019
W. Xiong, et al. "A small proton charge radius from an electron–proton scattering experiment." Nature 575 no.7781, 147-150 (2019).

C. Hernandez-Garcia, et al. "Compact -300  kV dc inverted insulator photogun with biased anode and alkali-antimonide photocathode." Phys. Rev. Accel. Beams 22, 113401(2019) .

E. Moffat, T. C. Rogers, N. Sato, and A. Signori. "Collinear factorization in wide-angle hadron pair production in e+e− annihilation." Phys. Rev. D 100, 094014 (2019).

Submit your papers for approval to the Jefferson Lab Publications database.

Attention collaboration authors (a message from Patrizia Rossi): The rules regarding publication of conference proceedings have recently changed. To learn more, click here. For questions, contact Kim Edwards at x7805. 

Jefferson Lab Archives Photo of the Week
Photo of Keith Baker
This week's photo features Keith Baker in1989. In 1993, he presented the "Finding Subatomic Particles at CEBAF" as part of the Science Series. Scope out the video here.


Nov. 21: Accelerator Seminar
Nov. 21: Staying Power: Women in Science
Nov. 26: Inventor Academy Talk
Nov. 27: A.I. Lunch Series
Nov. 28-29: Lab Closed - Thanksgiving Holiday

Dec. 4,11,18: A.I. Lunch Series
Dec. 7: Children's Holiday Party
Dec. 16: Shoe Truck Safety Shoes
Dec. 23-Jan 1: Lab Closed - Holiday Shutdown

Mar. 9-13: Exploring the Dark Side of the Universe

June 22-24: JLUO Annual Meeting

Accelerator and Experimental Schedule
Holiday Calendar 
Holiday Pie Orders
MOMO's Thanksgiving Menu
United Way - Last Ask
Role Models Needed
MOMO's Menu