The importance of jet shapes for tagging purposes

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• 作者：Sergio Calvente ; Javier Llorente ; Fernando Barreiro
• 关键词：jet shapes ; |VtsVts| ; Higgs associated production
• 刊名：Nuclear and Particle Physics Proceedings
• 出版年：2016
• 出版时间：April-June 2016
• 年：2016
• 卷：273-275
• 期：Complete
• 页码：2761-2763
• 全文大小：532 K

文摘

Recent measurements by the ATLAS Collaboration of b- and light jet-shapes in an id="mmlsi1" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601415010147&_mathId=si1.gif&_user=111111111&_pii=S2405601415010147&_rdoc=1&_issn=24056014&md5=84bf1839a53a553fb5389563b45f2bf0">ass="imgLazyJSB inlineImage" height="12" width="14" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601415010147-si1.gif">a>an class="mathContainer hidden">an class="mathCode">ath altimg="si1.gif" overflow="scroll">taccent="true">t‾ath>an>an>an> final states at the LHC, show clear evidence that b-jets are wider. There are also indications that b-jets in an id="mmlsi1" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601415010147&_mathId=si1.gif&_user=111111111&_pii=S2405601415010147&_rdoc=1&_issn=24056014&md5=84bf1839a53a553fb5389563b45f2bf0">ass="imgLazyJSB inlineImage" height="12" width="14" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601415010147-si1.gif">a>an class="mathContainer hidden">an class="mathCode">ath altimg="si1.gif" overflow="scroll">taccent="true">t‾ath>an>an>an> final states are narrower than those produced inclusively. We apply multivariate analysis techniques on MC generated samples to illustrate possible applications of these observations in two study cases: 1) measurement of |an id="mmlsi2" class="mathmlsrc">an class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601415010147&_mathId=si2.gif&_user=111111111&_pii=S2405601415010147&_rdoc=1&_issn=24056014&md5=1d49e8a7e7b244dd1378e54e6bb4b51f" title="Click to view the MathML source">V_tsan>an class="mathContainer hidden">an class="mathCode">ath altimg="si2.gif" overflow="scroll">Vtsath>an>an>an>| and 2) separation of an id="mmlsi3" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601415010147&_mathId=si3.gif&_user=111111111&_pii=S2405601415010147&_rdoc=1&_issn=24056014&md5=8ebecb49a0e4927bf79c6aaf12afad2e">ass="imgLazyJSB inlineImage" height="17" width="145" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601415010147-si3.gif">a>an class="mathContainer hidden">an class="mathCode">ath altimg="si3.gif" overflow="scroll">ppalse">&rarr;ZHalse">&rarr;l+l−baccent="true">b‾ath>an>an>an> from the continuum background i.e. an id="mmlsi4" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601415010147&_mathId=si4.gif&_user=111111111&_pii=S2405601415010147&_rdoc=1&_issn=24056014&md5=cdda98aa033005d071c9ea5780740633">ass="imgLazyJSB inlineImage" height="17" width="184" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601415010147-si4.gif">a>an class="mathContainer hidden">an class="mathCode">ath altimg="si4.gif" overflow="scroll">ppalse">&rarr;Z+baccent="true">b‾alse">&rarr;l+l−+baccent="true">b‾ath>an>an>an>. The lesson to be learned is that jet shape measurements show more potential in the former case than in the latter.