An angular analysis of B0→J/ψK+π- decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3 fb-1 collected with the LHCb detector. The m(K+π-) spectrum is divided into fine bins. In each m(K+π-) bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by K∗ resonances is examined, making minimal assumptions about the K+π- system. The data reject the K∗-only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the m(J/ψπ-) vs m(K+π-) plane suggests structures near m(J/ψπ-)=4200 and 4600 MeV.

Model-Independent Observation of Exotic Contributions to B0 →j /ψK+π- Decays / Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 122:15(2019), p. 152002. [10.1103/PhysRevLett.122.152002]

Model-Independent Observation of Exotic Contributions to B0 →j /ψK+π- Decays

Capriotti L.;Casse G.;Sarti A.;Sciubba A.;
2019

Abstract

An angular analysis of B0→J/ψK+π- decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3 fb-1 collected with the LHCb detector. The m(K+π-) spectrum is divided into fine bins. In each m(K+π-) bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by K∗ resonances is examined, making minimal assumptions about the K+π- system. The data reject the K∗-only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the m(J/ψπ-) vs m(K+π-) plane suggests structures near m(J/ψπ-)=4200 and 4600 MeV.
2019
Leptonic, semileptonic & radiative decays, Particle production, Bottom mesons
01 Pubblicazione su rivista::01a Articolo in rivista
Model-Independent Observation of Exotic Contributions to B0 →j /ψK+π- Decays / Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 122:15(2019), p. 152002. [10.1103/PhysRevLett.122.152002]
File allegati a questo prodotto
File Dimensione Formato  
PhysRevLett.122.152002.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 876.27 kB
Formato Adobe PDF
876.27 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1310099
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 28
social impact