wassname/cardsforscience
1
0
Fork 0
mirror of https://github.com/wassname/cardsforscience.git synced 2026-09-10 11:50:28 +08:00
Code Issues Packages Projects Releases Wiki Activity

Add text and images for W boson and top quark, clean up other text.

Browse Source
This commit is contained in:
Achintya Rao
2014-08-11 23:42:02 +02:00
parent 53ec991374
commit 26b47bb44a
8 changed files with 51 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files
html/CPV.html
+9 -9
View File
@@ -1,9 +1,9 @@
<p class="lead">You discovered CP-violation!</p>
<p class="lead">You discovered CP violation!</p>
<h4>CP Symmetry</h4>
<p>C (Charge) and P (Parity) are discrete transformations that can be applied to a physical system.</p>
<h5><b>CP Symmetry</b></h5>
<p>C (Charge) and P (Parity, which can be thought of as “handedness”) are discrete transformations that can be applied to a physical system.</p>
<p>If a theory is symmetric under C, then it works the same if all particles are exchanged with their antiparticles.
If it has P-symmetry, then it is invariant under inversion ("mirroring") of all spatial coordinates</p>
If it has P-symmetry, then it is invariant under inversion (“mirroring”) of all spatial coordinates.</p>
<p>For a long time, physicists believed that all of physics is invariant under the combination CP of both symmetries.
It turned out that this is wrong, as was discovered by Cronin, Fitch et al. in 1964 when they studied the decay of the neutral K meson.</p>
@@ -12,14 +12,14 @@ It turned out that this is wrong, as was discovered by Cronin, Fitch et al. in 1
<div class="row">
<h5>CPV in the Kaon System</h5>
<div class="col-md-3">
<img class="img-responsive" src="assets/info/cpv.png" alt="A plot from the original publication">
<img class="img-responsive" src="../assets/info/cpv.png" alt="A plot from the original publication">
</div>
<div class="col-md-3">
<p>In 1964, Cronin, Fitch, et al. showed that CP symmetry is broken in the decay of the long-lived neutral K meson.</p>
<p>If all of physics was invariant under CP transformation, then this long-lived version of the K meson would never decay into 2 pions.</p>
<p>Yet, this kind of decay was discovered!</p>
<p>You can see their results on the left: In the middle plot (the one relevant for K meson decays), a clear excess is recognizable.</p>
<p>For their discovery, Cronin and Fitch received the Nobel prize in 1980.</p>
<p>If all of physics was invariant under CP transformation, then this long-lived version of the K meson would never decay into two pions.</p>
<p>However, this kind of decay was discovered!</p>
<p>You can see their results on the left: In the middle plot (the one relevant for K-meson decays), a clear excess is recognizable.</p>
<p>For their discovery, Cronin and Fitch received the Nobel Prize in Physics in 1980.</p>
</div>
</div>