Jefferson Lab Weekly Briefs November 29, 2017

Jefferson Lab Weekly Briefs
November 29, 2017


Jefferson Lab Published Journal Articles, Nov. 19-25

  • Tomomi Ishikawa et al, "Renormalizability of quasiparton distribution functions." Phys. Rev. D 96, 094019 (2017).
  • J. M. Alarcon and C. Weiss, "Nucleon form factors in dispersively improved chiral effective field theory: Scalar form factor." Phys. Rev. C 96, 055206 (2017).

Remember to submit your papers for approval to the Jefferson Lab Publications database.

Archives Photo of the Week
This week's photo features the installation of Jefferson Lab's data farm in 2003.

Publications Refresher Course Offered on Dec. 11
Authors who need to brush up on their knowledge of the Jefferson Lab Publications System or who want to know more about DOE's PAGES will want to come to the next Publications Training and Refresher course on Monday, Dec. 11, at 11 a.m. in CEBAF Center room F228. Sessions typically last 30-45 minutes. To attend, send in your advance R.S.V.P. to Kim Edwards at

Center for Theoretical and Computational Physics

Hadron mass effects in semi-inclusive kaon production in deep-inelastic scattering (DIS) are calculated in a gauge-invariant way in collinear factorization, at leading order, in terms of kaon and nucleon mass dependent scaling variables. It is found that hadron mass corrections sizeably reduce the apparent large discrepancy between HERMES and COMPASS measurements of integrated K+ + K- multiplicities and fully reconcile their K+/ K- ratios. These results also highlight the importance of including hadron mass effects in theoretical calculations for a correct interpretation of semi-inclusive DIS measurements at the lower Jefferson Lab beam energy, especially at the dawn of the 12 GeV transverse momentum dependent (TMD) program.

Jefferson Lab Calendar of Events

Dec. 8: Toys for Tots donation deadline
Dec. 9: JAG Children's Holiday Party
Dec. 11: TIAA-CREF GSRA Open Enrollment ends
Dec. 25-Jan. 1: Holiday Shutdown, Jefferson Lab closed
Jan. 19: Mobile Mammography Unit On-site
Jan. 22-23: Hall C Collaboration Meeting
Jan. 24-25: Hall A Collaboration Meeting

Environment, Safety, Health and Quality

Hypothermia Risk Prevention
Hypothermia occurs when the body's temperature drops below 95 degrees. Severe shivering is one of the first signs. Shivering then gives way to drowsiness, exhaustion, confusion, shallow breathing, irregular heartbeat, slurred speech, loss of coordination, and, eventually, unconsciousness, and then death. Also be aware that one of the most bizarre symptoms of hypothermia is "paradoxical undressing," when a person actually feels like he or she is overheating due to a rush of warm blood to the extremities.

Hypothermia symptoms can present even when air temperatures are mildly chilly (~50 F). Before venturing outside on cold days, always take a moment to prepare yourself. Check the weather. Depending on factors including precipitation or wind, the temperature’s "real feel" may be lower than you think. Bundle up with layers of loose clothing instead of one thick layer, since this will allow you to remove or add layers as you work. Cover your head and ears with a warm hat, and wear socks that will keep your feet warm and dry. If you have signs of hypothermia, take these steps:

  • Move inside or to a warmer area;
  • Remove wet clothing;
  • Cover your head; and
  • Add layers (use towels or newspapers if necessary).

None of these steps are a substitute for proper medical care. Be sure to seek medical attention for advanced-stage hypothermia as soon as possible. The National Safety Council and WebMD were consulted for this article and offer more in-depth information.


In the News: Detector to Create 3D Model of Proton
The local Daily Press featured Jefferson Lab in a recent article on the same type of detectors built by the same team that recently announced a mysterious “void” within the Great Pyramid. The detectors, along with superconducting magnets and other state-of-the-art detection systems, will be used to help create a more precise 3D model of the proton. Read more here.

Test of Public Address System Set for 5:30 p.m. Today
On Wednesday, Nov. 29, members of the Jefferson Lab Emergency Management Team will conduct the recurring test of the lab’s Public Address (PA) System – the live audible announcement feature – available through the Cisco phones. No actions are required or expected from members of the lab community for this test. The test interrupts any in-progress call on a Cisco phone, with active calls automatically put on hold. For more information, see the full announcement.

Jefferson Lab to Test Tornado Warning Siren at 10:30 a.m. on Friday, Dec. 1
Jefferson Lab's tornado warning siren will undergo its monthly operational test at 10:30 a.m. on Friday, Dec. 1. Don't respond to the siren; this is a test of the siren system and not a personnel response exercise. Individuals planning to be in the Central Materials Storage Area (where the siren is located) while the test is taking place must have with them and wear two layers of hearing protection.

RadWorker I Training Offered
A Radiation Worker I qualification class will be held 9 a.m.- 5 p.m. on Wednesday, Dec. 6, in the large conference room in Bldg. 52 (ESH&Q Bldg.). If you wish to attend this class, contact Maya Keller as soon as possible at or x6021.

TIAA-CREF Individual Counseling Sessions Available on Dec. 14
TIAA-CREF is offering Individual Counseling Sessions at Jefferson Lab, where you can discuss your personal financial situation with a consultant on a confidential basis. The consultant will be available to discuss how to help you achieve your financial goals by investing in financial solutions, such as mutual funds, brokerage, life insurance and annuities. To schedule an appointment for Dec. 14, call TIAA-CREF at (800) 732-8353, Monday through Friday, 9 a.m.–8 p.m. These appointments will be held in Support Service Center room 221.

SOTR Training Offered Dec. 8
A Jefferson Lab training session for any new Subcontracting Officer Technical Representatives (GEN020) or anyone who wants a refresher class will be offered on Dec. 8. The GEN020 class will take place 8 a.m.-12:30 p.m. in room 53 of the Support Service Center, Bldg. 28. Advance registration is required, and you may see class availability in the Learning Management System. For class details, see the full memo.

U.S. Marine Corps Toys for Tots Toy Drive Underway Through Dec. 8
Jefferson Lab is participating in the U.S. Marine Corps Reserve's annual Toys for Tots toy drive. Place your new, unwrapped toy donations for children 1-12 years old, in collection boxes around the lab, no later than 2 p.m. Friday, Dec. 8. Collection boxes are available near the main entrances of CEBAF Center, the MCC, SSC, ESH&Q Building and the TED. The toy donations will be delivered to the Marines on Dec. 9 during the JAG Children’s Holiday Party. For details on all of the JAG holiday activities, see the full memo.

JSA 2017 TIAA-CREF 401K Open Enrollment Is Underway
The 401(k) Group Supplemental Retirement Annuity (GSRA) Open enrollment for Calendar Year 2018 will be offered through Dec. 11. If you wish to contribute more or less than the 5 percent default contribution, or opt out of this program, you must enter the on-line system no later than 5 p.m. on Monday, Dec. 11. All elections will be reflected in the Jan. 12, 2018, paycheck. For more information, see the full announcement.

Mobile Mammography Unit Onsite Jan. 19, 2018
The Chesapeake Regional Mobile Mammography Unit will be stationed in the ARC parking lot on Jan. 19, 2018. Appointments will be available during the hours of 9 a.m.-3 p.m. Mammography detects breast cancer, and The American Cancer Society recommends scheduling your first or baseline mammogram by age 40. This service is open to everyone, as personal health insurances will be billed. To make an appointment, call (757) 312-6400 or visit the website at

JLab Weekly Briefs is an ongoing publication providing information on the status of safety, accelerator operations, experiments, reviews, upcoming activities and special events. Deadline for submission is every Tuesday by 10 a.m. Submit new items to: the Communications Office or contact Kandice Carter at x7263.