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--- 2015:groups:sm:qg [2015/06/04 17:29]
andrzej.siodmok
+++ 2015:groups:sm:qg [2015/06/06 00:56]
jesse.thaler
@@ Line 409: / Line 409: @@
 </code>
+===== Notes for Jesse for Preparing Summary Talk =====
+  * Quark is more of an adjective than a noun.
+  * Pseudo-quark?  (That language doesn't go over very well.)
+==== What is a Quark Jet? ====
+(From ill-defined to well-defined)
+  * A quark parton
+  * A Born-level quark parton
+  * The initiating quark parton in a final state shower
+  * An eikonal line with baryon number 1/3 and carrying triplet color charge
+  * A quark operator that appears in a hard matrix element in the context of a factorization theorem.
+  * A parton-level jet object that has been tagged as a quark using a soft-safe flavored jet algorithm (automatically collinear safe if you sum constituent flavors).
+  * A phase space region (as defined by an unambiguous hadronic fiducial cross section measurement) that yields an enriched sample of quarks (as interpreted by some suitable, though fundamentally ambiguous, criterion).
+(Sometimes people think we care about the top of the list while we are really focused entirely on the bottom.)

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