Cross sections of 𝜂 mesons in 𝑝 +𝑝 collisions at forward rapidity at √𝑠 =500 GeV and central rapidity at √𝑠 =510 GeV

N. J. Abdulameer, U. Acharya, A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta’ani, J. Alexander, M. Alfred, D. Anderson, K. R. Andrews, A. Angerami, S. Antsupov, K. Aoki, N. Apadula, E. Appelt, Y. Aramaki, R. Armendariz, H. Asano, E. C. Aschenauer, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, N. S. Bandara, B. Bannier, E. Bannikov, K. N. Barish, B. Bassalleck, A. T. Basye, S. Bathe, V. Baublis, C. Baumann, A. Bazilevsky, M. Beaumier, S. Beckman, R. Belmont, J. Ben-Benjamin, R. Bennett, A. Berdnikov, Y. Berdnikov, L. Bichon, D. Black, B. Blankenship, D. S. Blau, J. S. Bok, V. Borisov, K. Boyle, M. L. Brooks

Physical Review D (2026)

Abstract

We present the first measurements of the forward and midrapidity

-meson cross sections from

p
+
p

collisions at

=
500

and 510 GeV, respectively. We also report the midrapidity

η
/

π
0

ratio at 510 GeV. The forward cross section is measured differentially in

-meson transverse momentum (

p
T

) from 1.0 to

6.5

GeV
/
c

for pseudorapidity

3.0
<
|
η
|
<
3.8

. The midrapidity cross section is measured from 3.5 to

GeV
/
c

for pseudorapidity

|
η
|
<
0.35

. Both cross sections serve as critical inputs to an updated global analysis of the

-meson fragmentation functions.

Cite this paper

@article{abdulameer2026cross,
  title = {Cross sections of 𝜂 mesons in 𝑝 +𝑝 collisions at forward rapidity at √𝑠 =500  GeV and central rapidity at √𝑠 =510  GeV},
  author = {N. J. Abdulameer and U. Acharya and A. Adare and C. Aidala and N. N. Ajitanand and Y. Akiba and R. Akimoto and H. Al-Ta’ani and J. Alexander and M. Alfred and D. Anderson and K. R. Andrews and A. Angerami and S. Antsupov and K. Aoki and N. Apadula and E. Appelt and Y. Aramaki and R. Armendariz and H. Asano and E. C. Aschenauer and E. T. Atomssa and T. C. Awes and B. Azmoun and V. Babintsev and M. Bai and N. S. Bandara and B. Bannier and E. Bannikov and K. N. Barish and B. Bassalleck and A. T. Basye and S. Bathe and V. Baublis and C. Baumann and A. Bazilevsky and M. Beaumier and S. Beckman and R. Belmont and J. Ben-Benjamin and R. Bennett and A. Berdnikov and Y. Berdnikov and L. Bichon and D. Black and B. Blankenship and D. S. Blau and J. S. Bok and V. Borisov and K. Boyle and M. L. Brooks},
  year = {2026},
  journal = {Physical Review D},
  doi = {10.1103/zvkl-wrlc},
  url = {https://crucible.eecs.umich.edu/papers/cross-sections-of-mesons-in-collisions-at-forward-rapidity-at-500-gev-and-32}
}