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	<id>https://keystagewiki.com/index.php?action=history&amp;feed=atom&amp;title=K-meson</id>
	<title>K-meson - Revision history</title>
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	<updated>2026-04-30T15:21:50Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://keystagewiki.com/index.php?title=K-meson&amp;diff=17773&amp;oldid=prev</id>
		<title>NRJC at 15:11, 18 July 2019</title>
		<link rel="alternate" type="text/html" href="https://keystagewiki.com/index.php?title=K-meson&amp;diff=17773&amp;oldid=prev"/>
		<updated>2019-07-18T15:11:03Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;Revision as of 15:11, 18 July 2019&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot; &gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 4:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;===About K-mesons===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;===About K-mesons===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;: '''K-mesons''' [[Radioactive Decay|decay]] via the [[Weak Nuclear Interaction|weak interaction]] to produce [[π-meson]]s. In this case [[strangeness]] is not conserved.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''NB: You do not need to memorise the exact composition of a given '''K-meson'''. However, you should be able to determine a possible [[quark]] composition given the [[Electrical Charge|charge]] and [[strangeness]] of the [[meson]] and by remembering the properties of the [[up-quark]], [[down-quark]] and [[strange-quark]].''&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''NB: You do not need to memorise the exact composition of a given '''K-meson'''. However, you should be able to determine a possible [[quark]] composition given the [[Electrical Charge|charge]] and [[strangeness]] of the [[meson]] and by remembering the properties of the [[up-quark]], [[down-quark]] and [[strange-quark]].''&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;: '''K-meson''' may consist of:&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;: '''K-meson''' may consist of:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>NRJC</name></author>
		
	</entry>
	<entry>
		<id>https://keystagewiki.com/index.php?title=K-meson&amp;diff=17772&amp;oldid=prev</id>
		<title>NRJC: Created page with &quot;==Key Stage 5== ===Meaning=== A '''K-meson''' is a type of meson which has a strangeness of +1 or -1.  ===About K-mesons=== ''NB: You do not need to memorise the exact...&quot;</title>
		<link rel="alternate" type="text/html" href="https://keystagewiki.com/index.php?title=K-meson&amp;diff=17772&amp;oldid=prev"/>
		<updated>2019-07-18T15:08:17Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;==Key Stage 5== ===Meaning=== A &amp;#039;&amp;#039;&amp;#039;K-meson&amp;#039;&amp;#039;&amp;#039; is a type of &lt;a href=&quot;/index.php/Meson&quot; title=&quot;Meson&quot;&gt;meson&lt;/a&gt; which has a &lt;a href=&quot;/index.php/Strangeness&quot; title=&quot;Strangeness&quot;&gt;strangeness&lt;/a&gt; of +1 or -1.  ===About K-mesons=== &amp;#039;&amp;#039;NB: You do not need to memorise the exact...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Key Stage 5==&lt;br /&gt;
===Meaning===&lt;br /&gt;
A '''K-meson''' is a type of [[meson]] which has a [[strangeness]] of +1 or -1.&lt;br /&gt;
&lt;br /&gt;
===About K-mesons===&lt;br /&gt;
''NB: You do not need to memorise the exact composition of a given '''K-meson'''. However, you should be able to determine a possible [[quark]] composition given the [[Electrical Charge|charge]] and [[strangeness]] of the [[meson]] and by remembering the properties of the [[up-quark]], [[down-quark]] and [[strange-quark]].''&lt;br /&gt;
: '''K-meson''' may consist of:&lt;br /&gt;
:*Up-antistrange [[quark]] pair (&amp;lt;math&amp;gt;K^+&amp;lt;/math&amp;gt;).&lt;br /&gt;
:*Down-antistrange [[quark]] pair (&amp;lt;math&amp;gt;K^0&amp;lt;/math&amp;gt;).&lt;br /&gt;
:*Strange-antiup [[quark]] pair (&amp;lt;math&amp;gt;K^-&amp;lt;/math&amp;gt;).&lt;br /&gt;
:*Strange-antidown [[quark]] pair (&amp;lt;math&amp;gt;\bar{K}^-&amp;lt;/math&amp;gt;).&lt;/div&gt;</summary>
		<author><name>NRJC</name></author>
		
	</entry>
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