Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00499362" target="_blank" >RIV/61389005:_____/18:00499362 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/18:00328094
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevD.98.112009" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.98.112009</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.98.112009" target="_blank" >10.1103/PhysRevD.98.112009</a>
Alternative languages
Result language
angličtina
Original language name
Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV
Original language description
The longitudinal spin transfer D-LL to Lambda and (Lambda) over bar hyperons produced in high-energy polarized proton-proton collisions is expected to be sensitive to the helicity distribution functions of strange quarks and antiquarks of the proton, and to longitudinally polarized fragmentation functions. We report an improved measurement of D-LL from data obtained at a center-of-mass energy of root s = 200 GeV with the STAR detector at RHIC. The data have an approximately twelve times larger figure of merit than prior results and cover vertical bar eta vertical bar<1.2 in pseudorapidity with transverse momenta p(T) up to 6 GeV/c. In the forward scattering hemisphere at largest p(T), the longitudinal spin transfer is found to be D-LL = - 0.036 +/- 0.048 (stat) +/- 0.013 (sys) for Lambda hyperons and D-LL = 0.032 +/- 0.043 (stat) +/- 0.013(sys) for <(Lambda)over bar> antihyperons. The dependences on eta and p(T) are presented and compared with model evaluations.
Czech name
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Czech description
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Classification
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
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
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Volume of the periodical
98
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
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UT code for WoS article
000454168500001
EID of the result in the Scopus database
2-s2.0-85059479764