Editing Massive particle

{{Short description|Particle having real positive rest mass}}
The physics technical term '''massive particle''' refers to a massful [[particle]] which has [[real number|real]] non-zero [[rest mass]] (such as [[Baryon#Baryonic_matter|baryonic matter]]), the counter-part to the term [[massless particle]]. According to [[special relativity]], the velocity of a massive particle is always less than the [[speed of light]].<ref name="Folman1995"/> When highlighting relativistic speeds, the synonyms '''bradyon''' (from {{langx|el|[[Wiktionary:βραδύς|βραδύς]]}}, ''bradys'', “slow”), '''tardyon'''<ref name="Gardner1980"/> or '''ittyon'''<ref name="Bilaniuk1969"/>
are sometimes used to contrast with [[massless particle|luxon]] (which moves at light speed) and hypothetical [[tachyon]] (which moves [[faster than light]]). 

==See also==
{{Wiktionary|bradyon|tardyon|ittyon}}
* [[Elementary particle]]
* [[Massless particle]]
* [[Particle]]
* [[Tachyon]]

==References==
<references>
<ref name="Bilaniuk1969">{{cite journal |author1=Olexa-Myron Bilaniuk |author2=E.C. George Sudarshan |title=Particles beyond the Light Barrier |journal=Physics Today |volume=22 |issue=5 |pages=43–51 |year=1969 |doi=10.1063/1.3035574 |bibcode = 1969PhT....22e..43B }}</ref>

<ref name="Folman1995">{{cite journal |author1=Ron Folman |author2=Erasmo Recami |title=On the Phenomenology of Tachyon Radiation |arxiv=hep-th/9508166 |year=1995 |journal=Foundations of Physics Letters |volume=8 |issue=2 | pages=127–134 |doi=10.1007/BF02187583 |bibcode=1995FoPhL...8..127F |s2cid=2758139}}</ref>

<ref name="Gardner1980">{{cite book |author=[[Martin Gardner]] |publisher=Prometheus Books |year=2008 |origyear=originally published February 1980 |chapter=Professor Cracker's Antitelephone |title=The Jinn From Hyperspace |page=119 |isbn=978-1-59102-565-8 |url=https://archive.org/details/jinnfromhyperspa0000gard_p6l9/page/119 |quote=Just as ordinary particles ('tardyons') can never be accelerated to the speed of light, so tachyons can never be slowed down to the speed of light.}}</ref>
</references>

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[[Category:Particle physics]]