* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Saturday, August 23, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    How to watch ‘F1: The Movie’ on Prime Video – About Amazon

    Experience the Thrill: How to Stream ‘F1: The Movie’ on Prime Video

    FOX One is now available on Prime Video: Here’s everything to know – About Amazon

    FOX One is now available on Prime Video: Here’s everything to know – About Amazon

    What Are Our Predictions for Taylor Swift’s ‘Life of a Showgirl’ Based on What She’s Told Us So Far? – yahoo.com

    Uncover the Hidden Surprises in Taylor Swift’s ‘Life of a Showgirl’ – Can You Decode Her Clues?

    Bama Dining Serving Up New Food, Entertainment – UA News Center

    Bama Dining Launches Thrilling New Food and Entertainment Experiences

    The latest on Williams-Brice Stadium renovations, entertainment district – On3

    Discover the Thrilling New Upgrades Coming to Williams-Brice Stadium and Its Vibrant Entertainment District!

    1000+ Entertainment Leaders Release Open Letter Criticizing TIFF’s Handling of Film – Creative Community for Peace

    1000+ Entertainment Leaders Release Open Letter Criticizing TIFF’s Handling of Film – Creative Community for Peace

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Alcorn State awarded grant to boost STEM with VR technology – WJTV

    Alcorn State Secures Grant to Transform STEM Education Through Cutting-Edge VR Technology

    Hyundai: The Only Way To Beat China Is To Embrace Technology – InsideEVs

    Hyundai’s Bold Strategy to Outpace China with Cutting-Edge Technology

    Teaching older adults how to use technology – WWNY

    Empowering Older Adults to Master Technology with Confidence

    Denver man receives pacemaker using new technology – CBS News

    Denver Man’s Life Transformed by Revolutionary Pacemaker Technology

    Morgan County Rescue Squad is using new technology to recover people missing in the water faster – WAFF

    Morgan County Rescue Squad is using new technology to recover people missing in the water faster – WAFF

    YSU to celebrate launch of new radiology technology program – WKBN.com

    YSU Launches Exciting New Radiology Technology Program Celebration

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    How to watch ‘F1: The Movie’ on Prime Video – About Amazon

    Experience the Thrill: How to Stream ‘F1: The Movie’ on Prime Video

    FOX One is now available on Prime Video: Here’s everything to know – About Amazon

    FOX One is now available on Prime Video: Here’s everything to know – About Amazon

    What Are Our Predictions for Taylor Swift’s ‘Life of a Showgirl’ Based on What She’s Told Us So Far? – yahoo.com

    Uncover the Hidden Surprises in Taylor Swift’s ‘Life of a Showgirl’ – Can You Decode Her Clues?

    Bama Dining Serving Up New Food, Entertainment – UA News Center

    Bama Dining Launches Thrilling New Food and Entertainment Experiences

    The latest on Williams-Brice Stadium renovations, entertainment district – On3

    Discover the Thrilling New Upgrades Coming to Williams-Brice Stadium and Its Vibrant Entertainment District!

    1000+ Entertainment Leaders Release Open Letter Criticizing TIFF’s Handling of Film – Creative Community for Peace

    1000+ Entertainment Leaders Release Open Letter Criticizing TIFF’s Handling of Film – Creative Community for Peace

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Alcorn State awarded grant to boost STEM with VR technology – WJTV

    Alcorn State Secures Grant to Transform STEM Education Through Cutting-Edge VR Technology

    Hyundai: The Only Way To Beat China Is To Embrace Technology – InsideEVs

    Hyundai’s Bold Strategy to Outpace China with Cutting-Edge Technology

    Teaching older adults how to use technology – WWNY

    Empowering Older Adults to Master Technology with Confidence

    Denver man receives pacemaker using new technology – CBS News

    Denver Man’s Life Transformed by Revolutionary Pacemaker Technology

    Morgan County Rescue Squad is using new technology to recover people missing in the water faster – WAFF

    Morgan County Rescue Squad is using new technology to recover people missing in the water faster – WAFF

    YSU to celebrate launch of new radiology technology program – WKBN.com

    YSU Launches Exciting New Radiology Technology Program Celebration

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Theoretical physicists present significantly improved calculation of the proton radius

October 7, 2023
in Science
Theoretical physicists present significantly improved calculation of the proton radius
Share on FacebookShare on Twitter

Theoretical physicists present significantly improved calculation of the proton radius

Isoscalar electromagnetic form factors at the lowest non-vanishing momentum (Q 2 ≈ 0.067 GeV2 ) on ensemble E300 as a function of the minimal source-sink separation entering the summation fit. Each blue point corresponds to a single fit starting at the value given on the horizontal axis. The associated weights in the average are represented by the red diamonds, with the gray curves and bands depicting the averaged results. Credit: arXiv (2023). DOI: 10.48550/arxiv.2309.07491

A group of theoretical physicists at Johannes Gutenberg University Mainz (JGU) has once again succeeded in significantly improving their calculations of the electric charge radius of the proton published in 2021. For the first time they obtained a sufficiently precise result completely without the use of experimental data.

With respect to the size of the proton, these new calculations also favor the smaller value. Concurrently, the physicists for the first time have published a stable theory prediction for the magnetic charge radius of the proton. All new findings can be found in three preprints published on the arXiv server.

All known atomic nuclei consist of protons and neutrons, yet many of the characteristics of these ubiquitous nucleons remain to be understood. Specifically, despite several years of effort, scientists have been unable to pin down the radius of the proton. In 2010, the result of a new proton radius measurement technique involving laser spectroscopy of muonic hydrogen caused a stir—in this ‘special’ kind of hydrogen, the electron in the shell of the atom was replaced by its heavier relative, the muon, which is a much more sensitive probe for the proton’s size.

The experimentalists came up with a significantly smaller value than that found following corresponding measurements of ‘normal’ hydrogen as well as the traditional method of determining the proton radius using electron-proton scattering. The big question that physicists have been asking ever since is whether this deviation could be evidence for new physics beyond the Standard Model or ‘simply’ reflects systematic uncertainties inherent to the different measuring methods.

Has the proton radius puzzle been solved?

In recent years, there has been increasing evidence that the smaller experimental value is the correct one, i.e. that there is no new physics behind the proton radius puzzle. Theoretical calculations make a significant contribution to answering this question definitively. Already in 2021, researchers led by Prof. Dr. Hartmut Wittig of the Mainz Cluster of Excellence PRISMA+ succeeded in performing so-called lattice calculations with sufficient precision to provide another reliable clue to the smaller proton radius.

“In the meantime, we have made another big step forward,” explains Hartmut Wittig. “For example, Miguel Salg, a doctoral student in my research group, has achieved very nice results that again significantly improve and extend our earlier calculation.”

Two years ago, the Mainz research group had “only” calculated the so-called isovector radius, which is not the same as the proton radius. They determined the value published at that time for the proton radius by adding experimental data for the neutron radius. “In the meantime, we have also calculated the fractions that were missing at that time, increased our statistics and better constrained the systematic errors, so that we can now completely dispense with experimental data for the first time,” Miguel Salg says.

“In addition, we were able to check the extent to which our 2021 result stands up to complete direct calculation—with the result that we were also correct with the 2021 value.” “With regard to the proton radius puzzle, we can safely say that even with the new calculations, the evidence continues to grow that the proton radius is correctly described by the smaller value,” Hartmut Wittig says.

The calculations of the Mainz physicists are based on the theory of quantum chromodynamics (QCD). It describes the interplay of forces in the atomic nucleus: The strong interaction binds the quarks, the elementary building blocks of matter, to form protons and neutrons and is mediated by gluons which act as exchange particles. In order to be able to treat these processes mathematically, the scientists at Mainz draw on what is called lattice field theory.

In this case, as if in a crystal, the quarks are distributed over the points of a discrete space-time lattice. Special simulation methods can then be used to calculate the properties of the nucleons using supercomputers: in a first step, the so-called electromagnetic form factors. These describe the distribution of electric charge and magnetization within the proton. From these, in turn, the proton radius can be determined.

First stable theory prediction for the magnetic charge radius

In addition to the electric charge radius, which has been discussed so far, the proton also has a magnetic charge radius, which also poses a puzzle. The Mainz theorists have also calculated this property on the basis of QCD. “One could illustrate the different radii in a very simplified way by the expansion of an accumulation of electric or magnetic charge given by the proton, which an incoming electron ‘sees’ in the scattering process,” Hartmut Wittig explains.

The Mainz group also obtained a stable prediction for the magnetic charge radius for the first time, based purely on theoretical calculations. “Furthermore, from the precise knowledge of the electric and magnetic form factors, we were able to derive for the first time the so-called Zemach radius of the proton purely from QCD, which is an important input quantity for the experimental measurements on muonic hydrogen. This shows once again how far the quality of lattice QCD calculations has advanced in the meantime,” Hartmut Wittig concludes.

More information:
Dalibor Djukanovic et al, Electromagnetic form factors of the nucleon from Nf=2+1 lattice QCD, arXiv (2023). DOI: 10.48550/arxiv.2309.06590

Dalibor Djukanovic et al, Precision calculation of the electromagnetic radii of the proton and neutron from lattice QCD, arXiv (2023). DOI: 10.48550/arxiv.2309.07491

Dalibor Djukanovic et al, Zemach radius of the proton from lattice QCD, arXiv (2023). DOI: 10.48550/arxiv.2309.17232

Journal information:
arXiv

Citation:
Theoretical physicists present significantly improved calculation of the proton radius (2023, October 6)
retrieved 6 October 2023
from https://phys.org/news/2023-10-theoretical-physicists-significantly-proton-radius.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Phys.org – https://phys.org/news/2023-10-theoretical-physicists-significantly-proton-radius.html

Tags: PhysicistsscienceTheoretical
Previous Post

Lack of sexually related injuries does not mean rape victim was ‘making it up,’ says study

Next Post

With seagrass discovery, we may be one good solution closer to solving climate change

Crossings: How Road Ecology is Shaping the Future of Our Planet – Living on Earth

Crossings: How Road Ecology is Shaping the Future of Our Planet

August 23, 2025
Toyota Friday Night Rivals kicks off season with Elizabethton at Science Hill – WCYB

Toyota Friday Night Rivals Ignite the Season with Elizabethton vs. Science Hill Showdown

August 23, 2025
Star Trek as Refuge for the Science-Minded – The Provincetown Independent

How Star Trek Ignites Passion and Empowers the Science-Minded

August 23, 2025
Refresh your wardrobe at these 11 QTS award-winning fashion and lifestyle stores – Time Out Worldwide

Transform Your Look with These 11 Must-Visit Fashion and Lifestyle Stores

August 23, 2025
Alcorn State awarded grant to boost STEM with VR technology – WJTV

Alcorn State Secures Grant to Transform STEM Education Through Cutting-Edge VR Technology

August 23, 2025
Is Mastantuono in line for a start this Sunday? – Yahoo Sports

Is Mastantuono Set to Make His Starting Debut This Sunday?

August 23, 2025
‘Urgent action’ needed to protect workers from heat stress in warming world, UN says – Reuters

Urgent Action Needed to Shield Workers from Rising Heat Risks in a Warming World

August 22, 2025
The United States’ Biggest Vulnerability in the Trade War: Its Knowledge Economy – World Politics Review

The United States’ Greatest Weakness in the Trade War: Its Knowledge Economy

August 22, 2025
How to watch ‘F1: The Movie’ on Prime Video – About Amazon

Experience the Thrill: How to Stream ‘F1: The Movie’ on Prime Video

August 22, 2025
Willis Knighton Health in Louisiana joins Mayo Clinic Care Network – Mayo Clinic News Network

Willis Knighton Health Teams Up with Mayo Clinic Care Network to Elevate Patient Care in Louisiana

August 22, 2025

Categories

Archives

August 2025
MTWTFSS
 123
45678910
11121314151617
18192021222324
25262728293031
« Jul    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (785)
  • Economy (805)
  • Entertainment (21,684)
  • General (16,619)
  • Health (9,845)
  • Lifestyle (818)
  • News (22,149)
  • People (807)
  • Politics (814)
  • Science (16,018)
  • Sports (21,304)
  • Technology (15,786)
  • World (786)

Recent News

Crossings: How Road Ecology is Shaping the Future of Our Planet – Living on Earth

Crossings: How Road Ecology is Shaping the Future of Our Planet

August 23, 2025
Toyota Friday Night Rivals kicks off season with Elizabethton at Science Hill – WCYB

Toyota Friday Night Rivals Ignite the Season with Elizabethton vs. Science Hill Showdown

August 23, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version