Pion
In particle physics, a pion (or a pi meson, denoted with the Greek letter pi: π) is any of three subatomic particles: π0, π+, and π−. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons (and, more generally, the lightest hadrons), because they are composed of the lightest quarks (the u and d quarks). They are unstable, with the charged pions π+ and π− decaying with a mean lifetime of 26 nanoseconds (6992260000000000000♠2.6×10−8 seconds), and the neutral pion π0 decaying with a much shorter lifetime of 6983840000000000000♠8.4×10−17 seconds. Charged pions most often decay into muons and muon neutrinos, and neutral pions into gamma rays.
The exchange of virtual pions, along with the vector, rho and omega mesons, provides an explanation for the residual strong force between nucleons. Pions are not produced in radioactive decay, but are produced commonly in high energy accelerators in collisions between hadrons. All types of pions are also produced in natural processes when high energy cosmic ray protons and other hadronic cosmic ray components interact with matter in the Earth's atmosphere. Recently, detection of characteristic gamma rays originating from decay of neutral pions in two supernova remnant stars has shown that pions are produced copiously in supernovas, most probably in conjunction with production of high energy protons that are detected on Earth as cosmic rays.
Pion (disambiguation)
A pion is a type of subatomic particle.
Pion may also refer to:
Protein pigeon homolog
Protein pigeon homolog also known as gamma-secretase activating protein (GSAP) is a protein that in humans is encoded by the PION gene.
Gene
The human PION gene is located on the long (q) arm of chromosome 7 at band 11.23, from base pair 76,778,007 to base pair 76,883,653. Highly conserved PION orthologs have been identified in most vertebrates for which complete genome data are available. More distantly related orthologs are also expressed in insects including the pigeon gene in Drosophila melanogaster that when mutated produces the "pigeon" phenotype. The name of the human PION gene derives the corresponding Drosophila gene.
Protein
The transcribed human pigeon homolog protein is 854 amino acid residues in length. A 16 kDa fragment (GSAP-16K) derived from 121 residues from the C-terminus region of the full length protein is known as the γ-secretase activating protein (GSAP).
Function
γ-secretase activating protein (GSAP) increases β-amyloid production through a mechanism involving its interactions with both γ-secretase and its substrate, the amyloid precursor protein (APP). By binding to both the γ-secretase enzyme and its APP substrate, GSAP increases the affinity and the selectivity of the enzyme for this particular substrate.
Podcasts:
Pion
ALBUMS
- Totemism released: 2007
- Goa Beach, Volume 4 released: 2006
Pion
ALBUMS
- Glyph Remixes released: 1996
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by Pau Hana
Feed The Demons
by: PainCreeping and Cracking
Baby don't look back, no one goes home tonight
The evil we see and the evil we do
Brings out the beast in me and you
Waking up from screaming
You think it's all in your head
My my, it's a bad day to be alive
It's crawling under your skin and feeds of your hate
Just close your eyes and wait till the sun goes down
You better stay awake
The dark comes knocking so you better start running
Fear the demon in me, Fear the demon in you
Hear the voices calling you
Shadow's tongue licking your flesh
Rips the clothes clean of your body
Strip you clean straight down to the bones
You can't stay awake, You can't fall asleep
He's coming for your life
Don't wanna wake up dead, you know you're over your head
There ain't no turning back
You better stay awake
The dark comes knocking so you better start running
Fear the demon in me, Fear the demon in you
Laying in sweet tears
Dreams are turning into a living hell
The nightmares you see and the terror you feel
Takes a turn for the worse and becomes real
You better stay awake
The dark comes knocking so you better start running
Latest News for: pion
Pion Charged with Sale of Narcotics as a Result of Search Warrant
The Newport Daily Express
18 Mar 2025
Man beats girlfriend, drags her onto I-95 where she is hit and killed, cops say
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