The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies √=7 and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb−1, respectively. The measurements are performed in three polarization frames, using Y → μμ decays in the kinematic region of the transverse momentum p T Υ  < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.

Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV / The LHCb collaboration, ., Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2017:12(2017). [10.1007/JHEP12(2017)110]

Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV

Capriotti, L.;Casse, G.;Kazeev, N.;Sarti, A.;Sciubba, A.;
2017

Abstract

The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies √=7 and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb−1, respectively. The measurements are performed in three polarization frames, using Y → μμ decays in the kinematic region of the transverse momentum p T Υ  < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.
2017
Hadron-Hadron scattering (experiments), Particle and resonance production, Polarization, QCD
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV / The LHCb collaboration, ., Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2017:12(2017). [10.1007/JHEP12(2017)110]
File allegati a questo prodotto
File Dimensione Formato  
Aaij2017_Article_MeasurementOfTheYNSPolarizatio.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 1.56 MB
Formato Adobe PDF
1.56 MB 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/11573/1074635
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 22
social impact