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Measurement of the polarization of the Υ(1S) and Υ(2S) states in pp̄ collisions at s=1.96TeV

Abstract:

We present a study of the polarization of the Υ(1S) and Υ(2S) states using a 1.3fb-1 data sample collected by the D0 experiment in 2002-2006 during run II of the Fermilab Tevatron Collider. We measure the polarization parameter α=(σT-2σL)/(σT+2σL), where σT and σL are the transversely and longitudinally polarized components of the production cross section, as a function of the transverse momentum (pTΥ) for the Υ(1S) and Υ(2S). Significant pTΥ-dependent longitudinal polarization is observed fo...

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Journal:
Physical Review Letters
Volume:
101
Issue:
18
Publication date:
2008-10-31
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Pubs id:
pubs:103508
UUID:
uuid:ca60d492-29f5-42bc-bb77-7d169c7103ca
Local pid:
pubs:103508
Source identifiers:
103508
Deposit date:
2012-12-19

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