Azimuthal asymmetries of back-to-back pi(+/-) - (pi(0), eta, pi(+/-)) pairs in e(+) e(-) annihilation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10407963" target="_blank" >RIV/00216208:11320/19:10407963 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ictXR8mK1F" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ictXR8mK1F</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.100.092008" target="_blank" >10.1103/PhysRevD.100.092008</a>

Result language
angličtina
Original language name
Azimuthal asymmetries of back-to-back pi(+/-) - (pi(0), eta, pi(+/-)) pairs in e(+) e(-) annihilation
Original language description
This work reports the first observation of azimuthal asymmetries around the thrust axis in e(+)e(-) annihilation of pairs of back-to-back charged pions in one hemisphere, and pi(0) and eta mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. The pi(0) and eta asymmetries rise with the relative momentum z of the detected hadrons as well as with the transverse momentum with respect to the thrust axis. These asymmetries are sensitive to the Collins fragmentation function H-1(perpendicular to) and provide complementary information to previous measurements with charged pions and kaons in the final state. In particular, the eta final states will provide additional information on the flavor structure of H-1(perpendicular to). This is the first measurement of the explicit transverse-momentum dependence of the Collins fragmentation function from Belle data. It uses a dataset of 980.4 fb(-1) collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/LTT17020" target="_blank" >LTT17020: Study of Beyond Standard Model Physics with the International Experiment Belle II in Japan</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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