Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button

Home > Press > New measurement explores fine details of proton structure

During the experiment, the probing electron seems to give all of its momentum
to one quark, which then passes part of it on to the proton's other quarks.
During the experiment, the probing electron seems to give all of its momentum to one quark, which then passes part of it on to the proton's other quarks.

Abstract:
A new, high-precision measurement of the proton's hidden inner structure carried out at DOE's Jefferson Lab has yielded a surprising result.

New measurement explores fine details of proton structure

Newport News, VA | Posted on August 30th, 2010

A collaboration of scientists measured the proton's form factors, quantities that describe the shape and size of the space over which the electric charge and electric current is spread.

The proton gets its charge from its building blocks: three quarks. The electric charge form factor, GEp, is connected to the electric field generated by the quarks' electric charges. As the charged quarks move around, they generate an electric current, which creates a magnetic field. The magnetic form factor, GMp, is therefore related to the quarks' movement.

The experiment set out to measure the ratio of the two form factors:
GEp/GMp. Previous measurements by the collaboration found that the electric charge form factor decreases significantly faster than the magnetic form factor. The new experiment measured the smallest value of the ratio by 50 percent.

In the experiment, the proton was probed with high-energy electrons from Jefferson Lab's CEBAF accelerator. The angle at which the electrons leave the proton was then measured, determining the so- called momentum transfer.

The experimenters found that the decrease revealed in previous measurements shows indications of slowing down. This slowing could indicate that the momentum transfer is approaching the region in which the electron probe is no longer probing the proton as a whole, but is beginning to study the individual quarks.

In addition, the researchers suspect they are also seeing a special circumstance of how the electron probe is interacting with the proton and its quarks. The electron carries enough energy to shatter the proton, but intact protons are detected. The electron seems to give its momentum to one quark, which then passes part of it on to the proton's other quarks.

The result was recently published in the journal Physical Review Letters.

####

For more information, please click here

Contacts:
Kandice Carter
757.269.7263

Copyright © Jefferson Lab

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016

Light and matter merge in quantum coupling: Rice University physicists probe photon-electron interactions in vacuum cavity experiments August 24th, 2016

New microchip demonstrates efficiency and scalable design: Increased power and slashed energy consumption for data centers August 24th, 2016

Tunneling nanotubes between neurons enable the spread of Parkinson's disease via lysosomes August 24th, 2016

Physics

Light and matter merge in quantum coupling: Rice University physicists probe photon-electron interactions in vacuum cavity experiments August 24th, 2016

Academic/Education

Nanotech Security Featured by Simon Fraser University: Company's Anti-Counterfeiting Technology Developed With the Help of University's 4D LABS Materials Research Institute August 21st, 2016

W.M. Keck Foundation awards Cal State LA a $375,000 research and education grant August 4th, 2016

Thomas Swan and NGI announce unique partnership July 28th, 2016

The NanoWizardŽ AFM from JPK is applied for interdisciplinary research at the University of South Australia for applications including smart wound healing and how plants can protect themselves from toxins July 26th, 2016

Announcements

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016

Light and matter merge in quantum coupling: Rice University physicists probe photon-electron interactions in vacuum cavity experiments August 24th, 2016

New microchip demonstrates efficiency and scalable design: Increased power and slashed energy consumption for data centers August 24th, 2016

Research partnerships

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

New theory could lead to new generation of energy friendly optoelectronics: Researchers at Queen's University Belfast and ETH Zurich, Switzerland, have created a new theoretical framework which could help physicists and device engineers design better optoelectronics August 23rd, 2016

A new way to display the 3-D structure of molecules: Metal-organic frameworks provide a new platform for solving the structure of hard-to-study samples August 21st, 2016

Researchers watch catalysts at work August 19th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic