We present a measurement of the azimuthal asymmetries of two charged pions in the inclusive process e+e-→ππX, based on a data set of 62 pb-1 at the center-of-mass energy of 3.65 GeV collected with the BESIII detector. These asymmetries can be attributed to the Collins fragmentation function. We observe a nonzero asymmetry, which increases with increasing pion momentum. As our energy scale is close to that of the existing semi-inclusive deep inelastic scattering experimental data, the measured asymmetries are important inputs for the global analysis of extracting the quark transversity distribution inside the nucleon and are valuable to explore the energy evolution of the spin-dependent fragmentation function.
Measurement of Azimuthal Asymmetries in Inclusive Charged Dipion Production in e+e- Annihilations at root s =3.65 GeV
GARZIA, Isabella;SAVRIE', Mauro;
2016
Abstract
We present a measurement of the azimuthal asymmetries of two charged pions in the inclusive process e+e-→ππX, based on a data set of 62 pb-1 at the center-of-mass energy of 3.65 GeV collected with the BESIII detector. These asymmetries can be attributed to the Collins fragmentation function. We observe a nonzero asymmetry, which increases with increasing pion momentum. As our energy scale is close to that of the existing semi-inclusive deep inelastic scattering experimental data, the measured asymmetries are important inputs for the global analysis of extracting the quark transversity distribution inside the nucleon and are valuable to explore the energy evolution of the spin-dependent fragmentation function.File | Dimensione | Formato | |
---|---|---|---|
PhysRevLett.116.042001.pdf
solo gestori archivio
Descrizione: versione editoriale
Tipologia:
Full text (versione editoriale)
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
353.79 kB
Formato
Adobe PDF
|
353.79 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
PhysRevLett.116.042001-accepted.pdf
accesso aperto
Descrizione: post print
Tipologia:
Post-print
Licenza:
PUBBLICO - Pubblico con Copyright
Dimensione
280.69 kB
Formato
Adobe PDF
|
280.69 kB | Adobe PDF | Visualizza/Apri |
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.