A search for the doubly charmed baryon Ξ+ cc is performed in the Ξ+ c π −π + invariant-mass spectrum, where the Ξ+ c baryon is reconstructed in the pK−π + final state. The study uses proton-proton collision data collected with the LHCb detector at a centreof-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb−1 . No significant signal is observed in the invariant-mass range of 3.4–3.8 GeV/c 2 . Upper limits are set on the ratio of branching fractions multiplied by the production cross-section with respect to the Ξ++ cc → (Ξ+ c → pK−π +)π + decay for different Ξ+ cc mass and lifetime hypotheses in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 2.5 to 25 GeV/c. The results from this search are combined with a previously published search for the Ξ+ cc → Λ + c K−π + decay mode, yielding a maximum local significance of 4.0 standard deviations around the mass of 3620 MeV/c 2 , including systematic uncertainties. Taking into account the look-elsewhere effect in the 3.5–3.7 GeV/c 2 mass window, the combined global significance is 2.9 standard deviations including systematic uncertainties

Search for the doubly charmed baryon $$ {\varXi}_{cc}^{+} $$ in the $$ {\varXi}_c^{+}{\pi}^{-}{\pi}^{+} $$ final state / Aaij, R., Abdelmotteleb, A.S.W., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:12(2021). [10.1007/JHEP12(2021)107]

Search for the doubly charmed baryon $$ {\varXi}_{cc}^{+} $$ in the $$ {\varXi}_c^{+}{\pi}^{-}{\pi}^{+} $$ final state

Casse, G.;Sarti, A.;
2021

Abstract

A search for the doubly charmed baryon Ξ+ cc is performed in the Ξ+ c π −π + invariant-mass spectrum, where the Ξ+ c baryon is reconstructed in the pK−π + final state. The study uses proton-proton collision data collected with the LHCb detector at a centreof-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb−1 . No significant signal is observed in the invariant-mass range of 3.4–3.8 GeV/c 2 . Upper limits are set on the ratio of branching fractions multiplied by the production cross-section with respect to the Ξ++ cc → (Ξ+ c → pK−π +)π + decay for different Ξ+ cc mass and lifetime hypotheses in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 2.5 to 25 GeV/c. The results from this search are combined with a previously published search for the Ξ+ cc → Λ + c K−π + decay mode, yielding a maximum local significance of 4.0 standard deviations around the mass of 3620 MeV/c 2 , including systematic uncertainties. Taking into account the look-elsewhere effect in the 3.5–3.7 GeV/c 2 mass window, the combined global significance is 2.9 standard deviations including systematic uncertainties
2021
Charm physics, Hadron-Hadron scattering (experiments), Branching fraction, QCD, Flavor physics
01 Pubblicazione su rivista::01a Articolo in rivista
Search for the doubly charmed baryon $$ {\varXi}_{cc}^{+} $$ in the $$ {\varXi}_c^{+}{\pi}^{-}{\pi}^{+} $$ final state / Aaij, R., Abdelmotteleb, A.S.W., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:12(2021). [10.1007/JHEP12(2021)107]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1673366
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