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

Publication ,  Journal Article
Acharya, S; Agarwal, A; Aglieri Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; Akindinov, A; Ali, B ...
Published in: Journal of High Energy Physics
October 1, 2025

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 ρ00 of the diagonal spin-density matrix for prompt D*+ mesons with 4 < pT< 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 ρ00> 1/3 has been found for pT> 15 GeV/c and 0.3 < |y| < 0.8 with a significance of 3.1σ. The measured spin alignment of prompt D*+ mesons is compared with the one of inclusive J/ψ mesons measured at forward rapidity (2.5 < y < 4).

Duke Scholars

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

Publication Date

October 1, 2025

Volume

2025

Issue

10

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics
 

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Acharya, S., Agarwal, A., Aglieri Rinella, G., Aglietta, L., Agnello, M., Agrawal, N., … Bhattacharjee, B. (2025). First measurement of D*+ vector meson spin alignment in Pb–Pb collisions at TeV. Journal of High Energy Physics, 2025(10). https://doi.org/10.1007/JHEP10(2025)094
Acharya, S., A. Agarwal, G. Aglieri Rinella, L. Aglietta, M. Agnello, N. Agrawal, Z. Ahammed, et al. “First measurement of D*+ vector meson spin alignment in Pb–Pb collisions at TeV.” Journal of High Energy Physics 2025, no. 10 (October 1, 2025). https://doi.org/10.1007/JHEP10(2025)094.
Acharya S, Agarwal A, Aglieri Rinella G, Aglietta L, Agnello M, Agrawal N, et al. First measurement of D*+ vector meson spin alignment in Pb–Pb collisions at TeV. Journal of High Energy Physics. 2025 Oct 1;2025(10).
Acharya, S., et al. “First measurement of D*+ vector meson spin alignment in Pb–Pb collisions at TeV.” Journal of High Energy Physics, vol. 2025, no. 10, Oct. 2025. Scopus, doi:10.1007/JHEP10(2025)094.
Acharya S, Agarwal A, Aglieri Rinella G, Aglietta L, Agnello M, Agrawal N, Ahammed Z, Ahmad S, Ahn SU, Ahuja I, Akindinov A, Akishina V, Al-Turany M, Aleksandrov D, Alessandro B, Alfanda HM, Alfaro Molina R, Ali B, Alici A, Alizadehvandchali N, Alkin A, Alme J, Alocco G, Alt T, Altamura AR, Altsybeev I, Alvarado JR, Anaam MN, Andrei C, Andreou N, Andronic A, Andronov E, Anguelov V, Antinori F, Antonioli P, Apadula N, Appelshäuser H, Arata C, Arcelli S, Arnaldi R, Arneiro JGMCA, Arsene IC, Arslandok M, Augustinus A, Averbeck R, Averyanov D, Azmi MD, Baba H, Badalà A, Bae J, Bae Y, Baek YW, Bai X, Bailhache R, Bailung Y, Bala R, Baldisseri A, Balis B, Bangalia S, Banoo Z, Barbasova V, Barile F, Barioglio L, Barlou M, Barman B, Barnaföldi GG, Barnby LS, Barreau E, Barret V, Barreto L, Barth K, Bartsch E, Bastid N, Basu S, Batigne G, Battistini D, Batyunya B, Bauri D, Bazo Alba JL, Bearden IG, Becht P, Behera D, Belikov I, Bell Hechavarria ADC, Bellini F, Bellwied R, Belokurova S, Beltran LGE, Beltran YAV, Bencedi G, Bensaoula A, Beole S, Berdnikov Y, Berdnikova A, Bergmann L, Bernardinis L, Betev L, Bhaduri PP, Bhasin A, Bhattacharjee B. First measurement of D*+ vector meson spin alignment in Pb–Pb collisions at TeV. Journal of High Energy Physics. 2025 Oct 1;2025(10).
Journal cover image

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

Publication Date

October 1, 2025

Volume

2025

Issue

10

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics