First measurement of D*+ vector meson spin alignment in Pb-Pb collisions at TeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00643887" target="_blank" >RIV/61389005:_____/25:00643887 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/25:00643887 RIV/68407700:21340/25:00388161
Result on the web
<a href="https://link.springer.com/article/10.1007/jhep10(2025)094" target="_blank" >https://link.springer.com/article/10.1007/jhep10(2025)094</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP10(2025)094" target="_blank" >10.1007/JHEP10(2025)094</a>

Result language
angličtina
Original language name
First measurement of D*+ vector meson spin alignment in Pb-Pb collisions at TeV
Original language description
The first measurement of prompt D*+-meson spin alignment in ultrarelativistic heavy-ion collisions with respect to the direction orthogonal to the reaction plane is presented. The spin alignment is quantified by measuring the element rho(00) of the diagonal spin-density matrix for prompt D*+ mesons with 4 < p(T)< 30 GeV/c in two rapidity intervals, |y| < 0.3 and 0.3 < |y| < 0.8, in central (0-10%) and midcentral (30-50%) Pb-Pb collisions at TeV. Evidence of spin alignment rho(00)> 1/3 has been found for p(T)> 15 GeV/c and 0.3 < |y| < 0.8 with a significance of 3.1 sigma. The measured spin alignment of prompt D*+ mesons is compared with the one of inclusive J/psi mesons measured at forward rapidity (2.5 < y < 4).
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
10304 - Nuclear physics

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

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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