Browse Definitions :
Definition

quark

Contributor(s): Vincent Martinez

A quark is one of two currently recognized groups of fundamental particles, which are subatomic, indivisible (at least as far as we know today) particles that represent the smallest known units of matter . Twelve fundamental particles - six quarks and six leptons (the other type) - are the basic building blocks for everything in the universe.

Both quarks and leptons are distinguished in terms of flavors . as a way to distinguish them from each other. The six quark flavors are: up, down, top, bottom, strange, and charm. Everything in our readily observable world seems to be made up of just the up quark, the down quark, and the electron (which is the most famous flavor of lepton).

Murray Gell-Mann named the quark in 1964. Independently of each other, Gell-Mann and another physicist, George Zweig, theorized that the differences between protons, neutrons, and newly discovered particles could be explained by the existence of these still smaller particles. Gell-Mann won the 1969 Nobel Prize in physics for his work with fundamental particles.

It is entirely possible that quarks and leptons may turn out to be made up of smaller particles. The atom , after all, was once thought to be the smallest possible unit of matter. However, as we now know, the nuclei of atoms are made up of protons and neutrons which are, in turn, made up of quarks and leptons.

This was last updated in September 2005

Continue Reading About quark

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

Dateiendungen und Dateiformate

Gesponsert von:

SearchCompliance

  • PCI DSS (Payment Card Industry Data Security Standard)

    The Payment Card Industry Data Security Standard (PCI DSS) is a widely accepted set of policies and procedures intended to ...

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance framework

    A compliance framework is a structured set of guidelines that details an organization's processes for maintaining accordance with...

SearchSecurity

  • Trojan horse (computing)

    In computing, a Trojan horse is a program downloaded and installed on a computer that appears harmless, but is, in fact, ...

  • identity theft

    Identity theft, also known as identity fraud, is a crime in which an imposter obtains key pieces of personally identifiable ...

  • DNS over HTTPS (DoH)

    DNS over HTTPS (DoH) is a relatively new protocol that encrypts domain name system traffic by passing DNS queries through a ...

SearchHealthIT

  • telemedicine (telehealth)

    Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the ...

  • Project Nightingale

    Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United ...

  • medical practice management (MPM) software

    Medical practice management (MPM) software is a collection of computerized services used by healthcare professionals and ...

SearchDisasterRecovery

SearchStorage

  • M.2 SSD

    An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification and is used in internally mounted ...

  • kilobyte (KB or Kbyte)

    A kilobyte (KB or Kbyte) is a unit of measurement for computer memory or data storage used by mathematics and computer science ...

  • virtual memory

    Virtual memory is a memory management capability of an operating system (OS) that uses hardware and software to allow a computer ...

Close