scholarly journals Erratum: Measurement of azimuthal asymmetries in inclusive production of hadron pairs ine+e−annihilation ats=10.58  GeV[Phys. Rev. D78, 032011 (2008)]

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
R. Seidl ◽  
M. Grosse Perdekamp ◽  
A. Ogawa ◽  
I. Adachi ◽  
H. Aihara ◽  
...  
Keyword(s):  
Inclusive Production ◽  
Azimuthal Asymmetries ◽  
Hadron Pairs

scholarly journals Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs ine+e−Annihilation at Belle

2006 ◽  
Vol 96 (23) ◽  
Author(s):  
R. Seidl ◽  
K. Hasuko ◽  
K. Abe ◽  
I. Adachi ◽  
H. Aihara ◽  
...  
Keyword(s):  
Inclusive Production ◽  
Azimuthal Asymmetries ◽  
Hadron Pairs

scholarly journals Measurement of azimuthal asymmetries in inclusive production of hadron pairs ine+e−annihilation ats=10.58  GeV

2008 ◽  
Vol 78 (3) ◽  
Author(s):  
R. Seidl ◽  
M. Grosse Perdekamp ◽  
A. Ogawa ◽  
I. Adachi ◽  
H. Aihara ◽  
...  
Keyword(s):  
Inclusive Production ◽  
Azimuthal Asymmetries ◽  
Hadron Pairs

Inclusive production of large-transverse-momentum hadrons and hadron pairs

1979 ◽  
Vol 20 (1) ◽  
pp. 53-81 ◽  
Author(s):  
H. Jöstlein ◽  
R. J. Engelmann ◽  
R. J. Fisk ◽  
M. L. Good ◽  
A. S. Ito ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Inclusive Production ◽  
Large Transverse Momentum ◽  
Hadron Pairs

scholarly journals DETECTING CORRELATED DI-HADRON PAIRS: ABOUT THE EXTRACTION OF TRANSVERSITY AND BEYOND

2014 ◽  
Vol 25 ◽  
pp. 1460045 ◽  
Author(s):  
MARCO RADICI ◽  
ALESSANDRO BACCHETTA ◽  
A. COURTOY
Keyword(s):  
Inelastic Scattering ◽  
Parton Distribution ◽  
Recent Analysis ◽  
Inclusive Production ◽  
Pion Pair ◽  
Collinear Factorization ◽  
Minkowski Space Time ◽  
Fragmentation Functions ◽  
Hadron Pairs ◽  
Θ Vacuum

We summarize the latest achievements about the extraction of the transversity parton distribution based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets in collinear factorization. Recently released data for proton and deuteron targets by HERMES and COMPASS allow for a flavor separation of the valence components of transversity. This extraction relies on di-hadron fragmentation functions. The latter have been taken from the first recent analysis of the semi-inclusive production of two pion pairs in back-to-back jets in e+e- annihilation. We also comment on the possibility of isolating new azimuthally asymmetric correlations of opposite pion pairs, which could arise when a fragmenting quark crosses parity-odd domains localized in Minkowski space-time and induced by the topologically nontrivial QCD background (the so-called θ vacuum).

scholarly journals Semi-inclusive production of two back-to-back hadron pairs in e+e− annihilation revisited

2018 ◽  
Vol 97 (7) ◽  
Author(s):  
Hrayr H. Matevosyan ◽  
Alessandro Bacchetta ◽  
Daniël Boer ◽  
Aurore Courtoy ◽  
Aram Kotzinian ◽  
...  
Keyword(s):  
Inclusive Production ◽  
Hadron Pairs

scholarly journals New COMPASS Results on Transverse Spin Asymmetries in Hadron Pair Production in DIS

2016 ◽  
Vol 40 ◽  
pp. 1660032 ◽  
Author(s):  
G. Sbrizzai
Keyword(s):  
Pair Production ◽  
Direct Measurement ◽  
Charged Pion ◽  
New Method ◽  
Transverse Spin ◽  
Spin Asymmetries ◽  
Azimuthal Asymmetries ◽  
Hadron Pairs ◽  
Oppositely Charged

The COMPASS measurements of the azimuthal asymmetries in the hadron pairs production in DIS on transversely polarised targets are here presented. Results on oppositely charged pion and kaon pairs produced on both deuteron and proton targets are shown. They have been used to update the calculation of the Transversity function which was previously extracted from the asymmetries measured from un-identified hadron pairs. Also a new method for the direct measurement of the integral of Transversity using both COMPASS and BELLE results is presented.

Measurement of Collins Asymmetries in Inclusive Production of Charged Pion Pairs at BESIII

2016 ◽  
Vol 40 ◽  
pp. 1660033
Author(s):  
Yinghui Guan
Keyword(s):  
Fragmentation Function ◽  
Charged Pion ◽  
Global Analysis ◽  
Inclusive Production ◽  
Inclusive Process ◽  
Text Data ◽  
Preliminary Results ◽  
Charged Pions ◽  
Important Input ◽  
Azimuthal Asymmetries

We present the preliminary results of the measurement of the azimuthal asymmetries of two charged pions in the inclusive process [Formula: see text] in the BESIII experiment. These asymmetries are attributed to the so-called Collins fragmentation function, which depict the behavior of a hadron produced from a transversely polarized quark. This spin-dependent function is an important input for the global analysis of extracting the transversity inside the nucleon. In addition, by comparison with the measured asymmetries at Belle, this measurement provides the first data to explore the [Formula: see text] evolution of the spin-dependent fragmentation function. This work is performed based on about 62[Formula: see text][Formula: see text] data collected with the BESIII detector at BEPCII at [Formula: see text]=3.65[Formula: see text]GeV.

scholarly journals HERMES AND THE SPIN OF THE PROTON

2002 ◽  
Vol 17 (25) ◽  
pp. 3551-3570 ◽  
Author(s):  
H. E. JACKSON
Keyword(s):  
Spin Structure ◽  
Total Angular Momentum ◽  
Virtual Compton Scattering ◽  
Gluon Polarization ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Double Spin ◽  
Azimuthal Asymmetries ◽  
Deep Virtual Compton Scattering ◽  
Hadron Pairs

HERMES is a second generation experiment to study the spin structure of the nucleon, in which measurements of the spin dependent properties of semi-inclusive deep-inelastic lepton scattering are emphasized. Data have been accumulated for semi-inclusive pion, kaon, and proton double-spin asymmetries, as well as for high-pT hadron pairs, and single-spin azimuthal asymmetries for pion electroproduction and deep virtual Compton scattering. These results provide information on the flavor decomposition of the polarized quark distributions in the nucleon and a first glimpse of the gluon polarization, while the observation of the azimuthal asymmetries show promise for probing the tensor spin of the nucleon and isolating the total angular momentum carried by the quarks.

scholarly journals Studies of Inclusive Hadron Production at BABAR

2015 ◽  
Vol 37 ◽  
pp. 1560065
Author(s):  
Ray F. Cowan
Keyword(s):  
Hadron Production ◽  
Inclusive Production ◽  
Full Data ◽  
Clean Environment ◽  
Momentum Spectra ◽  
B Factory ◽  
Azimuthal Asymmetries ◽  
Babar Detector ◽  
Deuteron Production

The clean environment of the e+e- collisions provided by the B-factory PEP-II and the high performances of the BABAR detector allow for precise measurements of the properties of inclusive hadron production. We present recent results obtained using the full data sample of nearly 500 fb-1 on measurements of the inclusive light hadrons momentum spectra, and on anti-deuteron production from decays of bottomonium states, and from continuum e+e- annihilation. We also present a measurement of the azimuthal asymmetries induced by the Collins effect in inclusive production of pion pairs in e+e- → ππX annihilation, where the two pions are produced in opposite hemispheres.

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