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Here, the $D^{**0}$ meson represents any of the three excited charm mesons $D_{1}(2420)^{0}$, $D_{2}^{*}(2460)^{0}$, and $D_{1}^{'}(2400)^{0}$. The $B^-\rightarrow D^{**0}\tau^-\overline{\nu}_{\tau}$ signal is measured with a significance of 3.5 $\sigma$, including systematic uncertainties. The combined branching fraction $\mathcal{B}(B^-\rightarrow D^{**0}_{1,2}\tau^-\overline{\nu}_{\tau})\times \mathcal{B}(D^{**0}_{1,2}\rightarrow D^{*+}\pi^-)$, where $D^{**0}_{1,2}$ denotes both $D_{1}(2420)^{0}$ and $D_{2}^{*}(2460)^{0}$ contributions, is measured to be $(0.051\pm0.013(stat)\pm 0.006(syst)\pm 0.009(\rm{ext}) )\%$, where the last uncertainty reflects that of the branching fraction of the normalisation channel $B^-\rightarrow D^{**0}_{1,2}D_s^{-(*)}$. The ratio between the tauonic and muonic semileptonic $B$ decays, with the latter taken from world average values, is also determined and found to be ${\cal R}(D^{**0}_{1,2})=0.13\pm0.03(stat)\pm0.01(syst)\pm0.02\,(\rm{ext})$. The first evidence for the decay $B^-\rightarrow D^{**0}\tau^-\overline{\nu_{\tau}}$ is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$ , at centre-of-mass energies of 7, 8 and 13 Tev. Here, the $D^{**0}$ meson represents any of the three excited charm mesons $D_{1}(2420)^{0}$, $D_{2}^{*}(2460)^{0}$, and $D_{1}^{'}(2400)^{0}$. The $B^-\rightarrow D^{**0}\tau^-\overline{\nu_{\tau}}$ signal is measured with a significance of 3.5 $\sigma$, including systematic uncertainties. The combined branching fraction $BR(B^-\rightarrow D^{**0}_{1,2}\tau^-\overline{\nu_{\tau}})\times BR(D^{**0}_{1,2}\rightarrow D^{*+}\pi^-)$, where $D^{**0}_{1,2}$ denotes both $D_{1}(2420)^{0}$ and $D_{2}^{*}(2460)^{0}$ contributions, is measured to be $(0.051\pm0.013(stat)\pm 0.006(syst)\pm 0.009(\rm{ext}) )\%$, where the last uncertainty reflects that of the branching fraction of the normalisation channel $B^-\rightarrow D^{**0}_{1,2}D_s^{(*)-}$. The ratio between the tauonic and muonic semileptonic $B$ decays, with the latter taken from world average values, is also determined and found to be ${\cal R}(D^{**0}_{1,2})=0.13\pm0.03(stat)\pm0.01(syst)\pm0.02\,(\rm{ext})$. 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href="https://cds.cern.ch/record/2922701">Evidence for $B^-\rightarrow D^{**0}\tau^-\overline{\nu}_{\tau}$ decays</a> > Access to Fulltext </td> </tr> </table> </div> <div class="pagebody"><div class="pagebodystripemiddle"> <div class="detailedrecordbox"> <div class="detailedrecordtabs"> <div> <ul class="detailedrecordtabs"><li class="first"><a href="https://cds.cern.ch/record/2922701/">Information </a></li><li class=""><a href="https://cds.cern.ch/record/2922701/references">References </a></li><li class=""><a href="https://cds.cern.ch/record/2922701/comments">Discussion (0) </a></li><li class="on"><a href="https://cds.cern.ch/record/2922701/files">Files </a></li></ul> <div id="tabsSpacer" style="clear:both;height:0px"> </div></div> </div> <div class="detailedrecordboxcontent"> <div class="top-left-folded"></div> <div class="top-right-folded"></div> <div class="inside">  <div id="detailedrecordshortreminder"> <div id="clip"> </div> <div id="HB"> <strong><a href="/record/2922701?ln=en">Evidence for $B^-\rightarrow D^{**0}\tau^-\overline{\nu}_{\tau}$ decays</a></strong> - <a href="/search?f=author&p=Aaij%2C%20Roel&ln=en">Aaij, Roel</a> <em>et al</em> - arXiv:2501.14943LHCb-PAPER-2024-037CERN-EP-2024-341 </div> </div> <div style="clear:both;height:1px"> </div> <div style="width:90%;margin:auto;min-height:100px;margin-top:10px">  <small><b>Main</b> file(s):</small><ul><table border="0" cellspacing="1" class="searchbox"> <tr> <td align="left" colspan="2" class="portalboxheader"> <img src='https://cds.cern.ch/img/smallfiles.gif' border="0" />  2501.14943 </td> </tr><tr> <td class="portalboxheader"> <font size="-2">version 1</font> </td> <td> <table> <tr> <td valign="top"> <small><a href="https://cds.cern.ch/record/2922701/files/2501.14943.pdf?version=1">2501.14943.pdf</a></small> </td> <td valign="top"> <font size="-2" color="green">[987.29 KB]</font> <font size="-2"><em>29 Jan 2025, 05:07</em> </td> <td valign="top"><em>Fulltext</em></td> </tr></table></td></tr></table></ul><small><b>Additional</b> file(s):</small><ul><table border="0" cellspacing="1" class="searchbox"> <tr> <td align="left" colspan="2" class="portalboxheader"> <img src='https://cds.cern.ch/img/smallfiles.gif' border="0" />  LHCb-PAPER-2024-037-supplementary </td> </tr><tr> <td class="portalboxheader"> <font size="-2">version 2<br />(see <a href="https://cds.cern.ch/record/2922701/files/?docname=LHCb-PAPER-2024-037-supplementary&version=all">previous</a>)</font> </td> <td> <table> <tr> <td valign="top"> <small><a href="https://cds.cern.ch/record/2922701/files/LHCb-PAPER-2024-037-supplementary.zip?version=2">LHCb-PAPER-2024-037-supplementary.zip</a></small> </td> <td valign="top"> <font size="-2" color="green">[481.93 KB]</font> <font size="-2"><em>31 Jan 2025, 15:21</em> </td> <td valign="top"><em>Supplementary information</em></td> </tr></table></td></tr></table></ul><small><b>LHCBPB_SOURCEF</b> file(s):</small><ul><table border="0" cellspacing="1" class="searchbox"> <tr> <td align="left" colspan="2" class="portalboxheader"> <img src='https://cds.cern.ch/img/smallfiles.gif' border="0" />  2501.14943v1 </td> </tr><tr> <td class="portalboxheader"> <font size="-2">version 2<br />(see <a href="https://cds.cern.ch/record/2922701/files/?docname=2501.14943v1&version=all">previous</a>)</font> </td> <td> <table> <tr> <td valign="top"> <small><a href="https://cds.cern.ch/record/2922701/files/2501.14943v1.pdf?version=2">2501.14943v1.pdf</a></small> </td> <td valign="top"> <font size="-2" color="green">[1.02 MB]</font> <font size="-2"><em>28 Jan 2025, 14:34</em> </td> <td valign="top"><em>Fulltext</em></td> </tr></table></td></tr></table></ul><small><b>LHCBPB_ZIPF</b> file(s):</small><ul><table border="0" cellspacing="1" class="searchbox"> <tr> <td align="left" colspan="2" class="portalboxheader"> <img src='https://cds.cern.ch/img/smallfiles.gif' border="0" />  LHCb-PAPER-2024-037-figures </td> </tr><tr> <td class="portalboxheader"> <font size="-2">version 2<br />(see <a href="https://cds.cern.ch/record/2922701/files/?docname=LHCb-PAPER-2024-037-figures&version=all">previous</a>)</font> </td> <td> <table> <tr> <td valign="top"> <small><a href="https://cds.cern.ch/record/2922701/files/LHCb-PAPER-2024-037-figures.zip?version=2">LHCb-PAPER-2024-037-figures.zip</a></small> </td> <td valign="top"> <font size="-2" color="green">[377.69 KB]</font> <font size="-2"><em>06 Feb 2025, 08:52</em> </td> <td valign="top"><em>Related data file(s)</em></td> </tr></table></td></tr></table></ul> </div> <div class="bottom-left-folded"></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"><a href="/search?ln=en&p=recid%3A2922701&rm=wrd" class="moreinfo">Similar records</a></span></div> </div> </div> </div> <br/> </div></div> <footer id="footer" class="pagefooter clearfix">  <div class="pagefooterstripeleft"> CERN Document Server :: <a class="footer" 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