prikaz prve stranice dokumenta First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev
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First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev
Physics Letters B, 846 (2023); 137920. https://doi.org/10.1016/j.physletb.2023.137920
(ALICE Collaboration) Acharya, S.; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, M.; ...; Karatović, David; ...; Lončar, Petra; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Vicković, Linda; ...; Zurlo, N. Više autora...

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Acharya, S., Erhardt, F., Gotovac, S., Jerčić, M., Karatović, D., Lončar, P. ... Zurlo, N. (2023). First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev. Physics Letters B, 846.. doi: 10.1016/j.physletb.2023.137920

Acharya, S., et al. "First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev." Physics Letters B, vol. 846, 2023. https://doi.org/10.1016/j.physletb.2023.137920

Acharya, S., Filip Erhardt, Sven Gotovac, M. Jerčić, David Karatović, Petra Lončar, Mirko Planinić, Nikola Poljak, Linda Vicković i N. Zurlo. "First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev." Physics Letters B 846 (2023). https://doi.org/10.1016/j.physletb.2023.137920

Acharya, S., et al. (2023) 'First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev', Physics Letters B, 846. doi: 10.1016/j.physletb.2023.137920

Acharya S, Erhardt F, Gotovac S, Jerčić M, Karatović D, Lončar P, i sur.. First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev. Physics Letters B [Internet]. 11.2023. [pristupljeno 06.08.2024.];846. doi: 10.1016/j.physletb.2023.137920

S. Acharya, et al., "First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev", Physics Letters B, vol. 846, Studeni 2023. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:861211. [Citirano: 06.08.2024.]

Za citiranje koristite ovu mrežnu adresu: https://urn.nsk.hr/urn:nbn:hr:217:861211
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Naslov (engleski)First measurement of prompt and non-prompt D*+ vector meson spin alignment in pp collisions at √s=13 Tev
AutorS. Acharya
Autor
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AutorFilip Erhardt
Autor
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AutorSven Gotovac
Autor
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AutorM. Jerčić
Autor
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AutorDavid Karatović
Autor
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AutorPetra Lončar
Autor
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AutorMirko Planinić
Autor
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AutorNikola Poljak
Autor
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AutorLinda Vicković
Autor
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AutorN. Zurlo
KolaboracijaALICE Collaboration
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Sažetak (engleski)
This letter reports the first measurement of spin alignment, with respect to the helicity axis, for D∗+ vector mesons and their charge conjugates from charm-quark hadronisation (prompt) and from beautymeson decays (non-prompt) in hadron collisions. The measurements were performed at midrapidity (|y| < 0.8) as a function of transverse momentum (pT) in proton–proton (pp) collisions collected by ALICE at the centre-of-mass energy √s = 13 TeV. The diagonal spin density matrix element ρ00 of D∗+ mesons was measured from the angular distribution of the D∗+ → D0(→ K−π+)π+ decay products, in the D∗+ rest frame, with respect to the D∗+ momentum direction in the pp centre of mass frame. The ρ00 value for prompt D∗+ mesons is consistent with 1/3, which implies no spin alignment. However, for nonprompt D∗+ mesons an evidence of ρ00 larger than 1/3 is found. The measured value of the spin density element is ρ00 = 0.455±0.022(stat.)±0.035(syst.) in the 5 < pT < 20 GeV/c interval, which is consistent with a Pythia 8 Monte Carlo simulation coupled with the EvtGen package, which implements the helicity conservation in the decay of D∗+ meson from beauty mesons. In non-central heavy-ion collisions, the spin of the D∗+ mesons may be globally aligned with the direction of the initial angular momentum and magnetic field. Based on the results for pp collisions reported in this letter it is shown that alignment of non-prompt D∗+ mesons due to the helicity conservation coupled to the collective anisotropic expansion may mimic the signal of global spin alignment in heavy-ion collisions.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaPhysics Letters B
Brojčani podacivol. 846, 137920
p-ISSN0370-2693
DOIhttps://doi.org/10.1016/j.physletb.2023.137920
URN:NBNurn:nbn:hr:217:861211
Datum objave publikacije2023-11
URL dokumentahttps://linkinghub.elsevier.com/retrieve/pii/S037026932300254X
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Imenovanje 4.0 međunarodna (CC BY 4.0)
Javna napomena© 2023 European Organization for Nuclear Research. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 15 December 2022. Received in revised form 6 March 2023. Accepted 14 April 2023. Available online 20 September 2023.
Datum i vrijeme pohrane2024-07-13 21:15:13