Theorist helps sharpen tests of fundamental theory in high energy experiments

Aug 08, 2013 by Lori Ann White
Left to right: Theoretical physicists and collaborators Xing-Gang Wu, Stan Brodsky and Matin Mojaza. Credit: Matin Mojaz

(Phys.org) —Three theoretical physicists have taken an important step toward eliminating theoretical ambiguities from the staggeringly complicated mathematics used to explore the interactions of quarks, the tiniest known bits of matter inside protons and neutrons, and gluons, the enigmatic particles responsible for keeping them trapped there. Simplifying these calculations can make them easier for other particle theorists to perform and lead to more accurate predictions for experimental particle physicists to test.

The theory describing those interactions is known as (QCD), and is an important component of the Standard Model, the reigning theory of the interactions of .

"An important goal in is to make predictions that are as precise as possible," said SLAC Stan Brodsky. "This makes tests of QCD more rigorous. Most important, if QCD doesn't pass our , it could reveal beyond the Standard Model."

In a paper published in Physical Review Letters, Brodsky and his colleagues – Matin Mojaza of CP3-Origins at the University of Southern Denmark and Xing-Gang Wu of Chongqing University in China – have presented a method that will help theorists to automatically eliminate an important theoretical ambiguity of QCD predictions.

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SLAC particle theorist Stan Brodsky has learned how to dive into the equations of particle physics to look for deeper meaning. Credit: SLAC Multimedia Communications

Particle theorists attempt to put the quantum realm under a mathematical microscope. However, the world of subatomic particles operates according to very different rules than our familiar everyday world. Quantum uncertainties take hold. On the scale of quarks and gluons, E=mc2 is not a slogan on a t-shirt, it's the law of the land – if there's a possibility for a particular particle to exist, it, and others, will pop into and out of existence, obscuring what lies under the physicists' calculational lenses.

These "now you see them, now you don't" particles, called , give rise to infinite terms in quantum calculations – a big problem for theorists, who must remove the uncertainty in their calculations caused by these infinities without introducing new ambiguities. This problem has obscured the precision of the theorists' mathematical microscope.

Brodsky and his colleagues have been developing a method called the Principle of Maximum Conformality (PMC) which can focus the mathematical microscope into the quantum world.

Building on this work, in their new paper, Mojaza, Wu and Brodsky show how a novel generalization of a technique that many theorists employ to remove infinities, called modified minimal subtraction, can be used to identify patterns within the calculations. This, along with PMC, makes the calculations easier to reduce to a form that can be used to make testable predictions, free of ambiguities – the heart of scientific progress.

In addition to adding another tool to the theorists' toolbox and providing testable predictions to experimenters, their technique has another advantage, said Brodsky: "Since the method is systematic, it can be used as the basis of a computer algorithm," automating the calculations even further.

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More information: prl.aps.org/abstract/PRL/v110/i19/e192001

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shavera
5 / 5 (6) Aug 08, 2013
Funny how everybody and their brother thinks they've found "The theory that 'they' don't want you to know about" on the internet. Yet none of them seem to pursue a career in physics and publish exactly why that theory is correct.
hemitite
5 / 5 (3) Aug 08, 2013
"They" won't let them!
_ntony_ossett
1 / 5 (3) Sep 11, 2013
-1² = 1
-(1)² = -1

Root of all acceleration is dark energy, resistance being negative in nature it itself accelerates matter being acceleration its very self in that respect we can pray to a higher power for the drive of acceleration is -1².
Utilizing dark matter, we can harvest dark energy from it enabling a new acceleration force. Example:
You are walking 5 mph walking speed... 5 miles in an hour... right?
Utilizing harvested dark energy in front of you now you're walking at :

-5²mph = -5*-5mph = 25 mph

The measure in miles per hour would be in the negative, essentially with dark-energy you'd be utilizing darkness to match the speed of light, of course the both being oppositions light came from darkness. Light exists because dark needed an opposition for creation. Everything evolves, even nothingness is something, null and 0 governs the universe from stacking matter on top of itself over and over by setting it's solid bubble of what is capable and how far it expands.

_ntony_ossett
1 / 5 (3) Sep 11, 2013
A blackhole is a stomach, it consumes with acceleration and expands with acceleration. Our universe is a blackhole consumes itself and spits it out again.

Like Ren and Stimpy when Stimpy dives into his own belly-button consuming himself; that is the very definition of our universe:

4th dimensional hypercube on a eular spiral format... if you slap a coordinate plane on two connected spirals, you'll get -1 on utilizing all 4 quadrants, in respect to 4th dimension... everything within the 4th dimensional universe holds 3 dimensional physics where everything has a trinity... 2 opposing forces and 1 neutral force to force unity.
_ntony_ossett
1 / 5 (3) Sep 11, 2013
/en.wikipedia.org/wiki/Atum