Multi-strange baryon spectroscopy at the LHCb experiment in $\Omega_c^0 \rightarrow \Xi^- K^- \pi^+ \pi^+$ decays

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Using data from the LHCb experiment, a Boosted Decision Tree (BDT) classifier is developed, enhancing the signal-to-background ratio by a factor 2 compared to standard selection criteria. This approach resulted in a clean $\Omega_c^0$ mass peak, enabling the exploration of excited states. The invariant mass spectra reveal hints of a potential resonance. 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Barcelona (main))</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2024 - 11.</td></tr> <tr><td class="formatRecordLabel"> Thesis note </td><td style="padding-left:5px;">Bachelor : U. Barcelona (main) : 2024</td></tr> <tr><td class="formatRecordLabel"> Thesis supervisor(s) </td><td style="padding-left:5px;"><a href="/search?f=author&p=Calefice, Lukas">Calefice, Lukas</a> ; <a href="/search?f=author&p=Marin Benito, Carla">Marin Benito, Carla</a></td></tr> <tr><td class="formatRecordLabel"> Note </td><td style="padding-left:5px;">Presented 17 Jan 2024</td></tr> <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Particle Physics - Experiment</td></tr> <tr><td class="formatRecordLabel"> Accelerator/Facility, Experiment </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?p=CERN%20LHC&f=693__a">CERN LHC</a> ; <a href="https://cds.cern.ch/search?p=LHCb&f=693__e">LHCb</a></td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">In this study, the decay $\Omega_c^0 \rightarrow \Xi^- K^- \pi^+ \pi^+$ is analysed to search for the presence of excited $\Omega^-$ baryon states. Using data from the LHCb experiment, a Boosted Decision Tree (BDT) classifier is developed, enhancing the signal-to-background ratio by a factor 2 compared to standard selection criteria. This approach resulted in a clean $\Omega_c^0$ mass peak, enabling the exploration of excited states. The invariant mass spectra reveal hints of a potential resonance.</td></tr> </table> <br/>Email contact: <a href="mailto:lhcb.secretariat@cern.ch">lhcb.secretariat@cern.ch</a> <small> </small> <small> </small> <br/><br/><div align="right"><div style="padding-bottom:2px;padding-top:30px;"><span class="moreinfo" style="margin-right:10px;"> <a href="" class="moreinfo">Back to search</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Record created 2025-01-17, last modified 2025-01-21</div></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"></span></div> </div> </div> </div> <br/> <br /> <div class="detailedrecordminipanel"> <div class="top-left"></div><div class="top-right"></div> <div class="inside"> <div id="detailedrecordminipanelfile" style="width:33%;float:left;text-align:center;margin-top:0"> <div><small class="detailedRecordActions">Fulltext:</small> <br /><a href="/record/2921782/files/CERN-THESIS-2024-308.pdf"><img style="border:none" src="/img/file-icon-text-34x48.gif" alt="Download fulltext" /><br />PDF</a><br /></div> </div> <div id="detailedrecordminipanelreview" style="width:30%;float:left;text-align:center"> </div> <div id="detailedrecordminipanelactions" style="width:36%;float:right;text-align:right;"> <ul class="detailedrecordactions"> <li><a href="/yourbaskets/add?ln=en&recid=2921782">Add to personal basket</a></li> <li>Export as <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/hx?ln=en">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/hm?ln=en">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/xm?ln=en">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/xd?ln=en">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/xe?ln=en">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/xn?ln=en">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2921782/export/xw?ln=en">RefWorks</a> </li> </ul> <div style='padding-left: 13px;'>  <div id="bookmark"></div> <div id="bookmark_sciencewise"></div> <style type="text/css"> #bookmark_sciencewise, #bookmark {float: left;} #bookmark_sciencewise li {padding: 2px; width: 25px;} #bookmark_sciencewise ul, #bookmark ul {list-style-image: none;} </style> <script type="text/javascript" src="/js/jquery.bookmark.min.js"></script> <style type="text/css">@import "/css/jquery.bookmark.css";</style> <script type="text/javascript">// <![CDATA[ $.bookmark.addSite('sciencewise', 'ScienceWise.info', 'https://cds.cern.ch/img/sciencewise.png', 'en', 'bookmark', 'http://sciencewise.info/bookmarks/cds:2921782/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2921782', addEmail: true, title: "Multi-strange baryon spectroscopy at the LHCb experiment in $\\Omega_c^0 \\rightarrow \\Xi^- K^- \\pi^+ \\pi^+$ decays", description: "In this study, the decay $\\Omega_c^0 \\rightarrow \\Xi^- K^- \\pi^+ \\pi^+$ is analysed to search for the presence of excited $\\Omega^-$ baryon states. Using data from the LHCb experiment, a Boosted Decision Tree (BDT) classifier is developed, enhancing the signal-to-background ratio by a factor 2 compared to standard selection criteria. This approach resulted in a clean $\\Omega_c^0$ mass peak, enabling the exploration of excited states. 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Multi-strange baryon spectroscopy at the LHCb experiment in $\Omega_c^0 \rightarrow \Xi^- K^- \pi^+ \pi^+$ decays - CERN Document Server