Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP
Abstract We discuss how to calculate cross sections as well as rapidity, transverse momentum and energy distributions of ντ and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ produced from the direct D s ± → ν τ / ν ¯ τ $$ {D}_s^{\pm}\to {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ and chain D s ± → τ + / τ − →...
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| Format: | Article |
| Language: | English |
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2020-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2020)116 |
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| author | Rafał Maciuła Antoni Szczurek Jakub Zaremba Izabela Babiarz |
| author_facet | Rafał Maciuła Antoni Szczurek Jakub Zaremba Izabela Babiarz |
| author_sort | Rafał Maciuła |
| collection | DOAJ |
| description | Abstract We discuss how to calculate cross sections as well as rapidity, transverse momentum and energy distributions of ντ and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ produced from the direct D s ± → ν τ / ν ¯ τ $$ {D}_s^{\pm}\to {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ and chain D s ± → τ + / τ − → ν τ / ν ¯ τ $$ {D}_s^{\pm}\to {\tau}^{+}/{\tau}^{-}\to {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ decays in p+96 Mo scattering with proton beam Elab = 400 GeV i.e. at s NN $$ {\sqrt{s}}_{NN} $$ = 27.4 GeV. The τ decays are simulated with the help of the Tauola code and include multiple decay channels of τ in amounts proportional to their branching ratios. In our calculations we include D s ± $$ {D}_s^{\pm } $$ from charm fragmentation c → D s + $$ {D}_s^{+} $$ and c ¯ → D s − $$ \overline{c}\to {D}_s^{-} $$ as well as those from subleading fragmentation of strange quarks/antiquarks s → D s − $$ {D}_s^{-} $$ and s ¯ → D s + $$ \overline{s}\to {D}_s^{+} $$ . The s ≠ s ¯ $$ s\ne \overline{s} $$ asymmetry of the strange quark content of proton is included. The different contributions to D s + $$ {D}_s^{+} $$ and ν τ / ν ¯ τ $$ {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ are shown explicitly. We discuss and quantify a not discussed so far effect of asymmetries for production of ντ and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ caused by subleading fragmentation mechanism and discuss related uncertainties. A potential measurement of the asymmetry is discussed. Estimates of a number of observed ν τ / ν ¯ τ $$ {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ in the ν τ / ν ¯ τ $$ {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ +208Pb reaction, with 2m long target are given with the help of the NuWro program. We refer also to the production of the high-energy (anti)neutrinos in the atmosphere. |
| format | Article |
| id | doaj-art-f539c435d1e8421b87c693669f55db7f |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-f539c435d1e8421b87c693669f55db7f2025-01-26T12:11:15ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020112710.1007/JHEP01(2020)116Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiPRafał Maciuła0Antoni Szczurek1Jakub Zaremba2Izabela Babiarz3Institute of Nuclear Physics, Polish Academy of SciencesInstitute of Nuclear Physics, Polish Academy of SciencesInstitute of Nuclear Physics, Polish Academy of SciencesInstitute of Nuclear Physics, Polish Academy of SciencesAbstract We discuss how to calculate cross sections as well as rapidity, transverse momentum and energy distributions of ντ and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ produced from the direct D s ± → ν τ / ν ¯ τ $$ {D}_s^{\pm}\to {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ and chain D s ± → τ + / τ − → ν τ / ν ¯ τ $$ {D}_s^{\pm}\to {\tau}^{+}/{\tau}^{-}\to {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ decays in p+96 Mo scattering with proton beam Elab = 400 GeV i.e. at s NN $$ {\sqrt{s}}_{NN} $$ = 27.4 GeV. The τ decays are simulated with the help of the Tauola code and include multiple decay channels of τ in amounts proportional to their branching ratios. In our calculations we include D s ± $$ {D}_s^{\pm } $$ from charm fragmentation c → D s + $$ {D}_s^{+} $$ and c ¯ → D s − $$ \overline{c}\to {D}_s^{-} $$ as well as those from subleading fragmentation of strange quarks/antiquarks s → D s − $$ {D}_s^{-} $$ and s ¯ → D s + $$ \overline{s}\to {D}_s^{+} $$ . The s ≠ s ¯ $$ s\ne \overline{s} $$ asymmetry of the strange quark content of proton is included. The different contributions to D s + $$ {D}_s^{+} $$ and ν τ / ν ¯ τ $$ {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ are shown explicitly. We discuss and quantify a not discussed so far effect of asymmetries for production of ντ and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ caused by subleading fragmentation mechanism and discuss related uncertainties. A potential measurement of the asymmetry is discussed. Estimates of a number of observed ν τ / ν ¯ τ $$ {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ in the ν τ / ν ¯ τ $$ {\nu}_{\tau }/{\overline{\nu}}_{\tau } $$ +208Pb reaction, with 2m long target are given with the help of the NuWro program. We refer also to the production of the high-energy (anti)neutrinos in the atmosphere.https://doi.org/10.1007/JHEP01(2020)116QCD Phenomenology |
| spellingShingle | Rafał Maciuła Antoni Szczurek Jakub Zaremba Izabela Babiarz Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP Journal of High Energy Physics QCD Phenomenology |
| title | Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP |
| title_full | Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP |
| title_fullStr | Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP |
| title_full_unstemmed | Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP |
| title_short | Production asymmetry of ντ neutrinos and ν ¯ τ $$ {\overline{\nu}}_{\tau } $$ antineutrinos from a fixed target experiment SHiP |
| title_sort | production asymmetry of ντ neutrinos and ν ¯ τ overline nu tau antineutrinos from a fixed target experiment ship |
| topic | QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP01(2020)116 |
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