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Measurement of $\omega$ meson production in pp collisions at $\sqrt{s}$ = 13 TeV

The ALICE collaboration Acharya, Shreyasi ; Adamova, Dagmar ; Agarwal, Apar ; et al.

JHEP 04 (2025) 067, 2025.

Inspire Record 2848263 DOI 10.17182/hepdata.157865

The $p_{\rm T}$-differential cross section of $\omega$ meson production in pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|<0.5$) was measured with the ALICE detector at the LHC, covering an unprecedented transverse-momentum range of $1.6 < p_{\rm T} <50$ GeV/$c$. The meson is reconstructed via the $\omega\rightarrow\pi^+\pi^-\pi^0$ decay channel. The results are compared with various theoretical calculations: PYTHIA8.2 with the Monash 2013 tune overestimates the data by up to 50%, whereas good agreement is observed with Next-to-Leading Order (NLO) calculations incorporating $\omega$ fragmentation using a broken SU(3) model. The $\omega/\pi^0$ ratio is presented and compared with theoretical calculations and the available measurements at lower collision energies. The presented data triples the $p_{\rm T}$ ranges of previously available measurements. A constant ratio of $C^{\omega/\pi^0}=0.578\pm0.006~\text{(stat.)}\pm 0.013~\text{(syst.)}$ is found above a transverse momentum of 4 GeV/$c$, which is in agreement with previous findings at lower collision energies within the systematic and statistical uncertainties.

2 data tables

Table 1

Invariant differential cross section of OMEGA mesons produced in inelastic pp collisions at center-of-mass energy 13 TeV, the uncertainty of sigma_{MB} of 1.58% is not included in the systematic error.

Table 2

The measured ratio of cross sections for inclusive OMEGA to PI0 production at a centre-of-mass energy of 13 TeV.

Inclusive production of omega mesons at large transverse momenta in pi- Be interactions at 515-GeV/c.

The E706 collaboration Apanasevich, L. ; Bacigalupi, J. ; Baker, W. ; et al.

FERMILAB-PUB-00-054-E, 2000.

Inspire Record 525948 DOI 10.17182/hepdata.42994

We present results on the production of omega mesons at high transverse momenta in pi^-Be interactions at 515 GeV/c. The data span the kinematic range 3.5 < p_T < 8 GeV/c. We compare the measured cross section with expectations from Monte Carlo QCD generators. The relative yield of omega to pi^0 mesons is used to extract the ratio of vector to pseudoscalar meson production for the first generation of quarks.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Anti-nuclei production in Pb + Pb collisions at 158-A/GeV/c

The NA52 (NEWMASS) collaboration Appelquist, G. ; Baglin, C. ; Beringer, J. ; et al.

Phys.Lett.B 376 (1996) 245-250, 1996.

Inspire Record 40550 DOI 10.17182/hepdata.50119

We investigate antinuclei production in Pb + Pb interactions at 158 GeV/ c per nucleon at zero degree production angle. We quote invariant differential production cross sections for antiprotons and antideuterons. The corresponding antideuteron to antiproton ratio at midrapidity is 4.2 · 10 −4 . One antihelium-3 nucleus was observed. The results are discussed in the framework of a simple coalescence model.

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Strangelet search and antinuclei production studies in Pb + Pb collisions

The NA52 (NEWMASS) collaboration Ambrosini, G. ; Appelquist, G. ; Arsenescu, R. ; et al.

Nucl.Phys.A 610 (1996) 306C-316C, 1996.

Inspire Record 432734 DOI 10.17182/hepdata.36512

We searched for long-lived strange quark matter particles, so-called strangelets , and studied particle and antiparticle production in Pb + Pb collisions at 158 GeV/ c per nucleon at zero degree production angle. We give upper limits for the production of strangelets covering a mass to charge ratio up to 120 GeV/ c 2 and lifetimes t lab > 1.2 μ s and plot invariant differential production cross sections as a function of rapidity for a variety of particles.

1 data table

Table 1

No description provided.

Deuteron and anti-deuteron production in CERN experiment NA44

The NA44 collaboration Simon-Gillo, Jehanne ; Boggild, H. ; Boissevain, J. ; et al.

Nucl.Phys.A 590 (1995) 483C-486C, 1995.

Inspire Record 407669 DOI 10.17182/hepdata.36518

The abundances of light nuclei probe the later stages of the evolution of a system formed in a relativistic heavy-ion collision. After the system has cooled and expanded, nucleons in close proximity and moving with small relative momenta coalesce to form nuclei. Light nuclei production enables the study of several topics, including the mechanism of composite particle production, freeze-out temperature, size of the interaction region, and entropy of the system. NA44 is the only relativistic heavy-ion experiment to have both deuteron and antideuteron results in both pA and AA collisions and the first CERN experiment to study the physics topics addressed by d and d production.

1 data table

Table 1

PRELIMINARY DATA.

Subthreshold anti-proton and K- production in heavy ion collisions

Schroter, A. ; Berdermann, E. ; Geissel, H. ; et al.

Z.Phys.A 350 (1994) 101-113, 1994.

Inspire Record 372238 DOI 10.17182/hepdata.16507

Subthreshold ¯p andK− and energeticπ− production was studied in Ne + NaF, Cu, Sn and Bi, and in Ni + Ni collisions with incident energies between 1.6 and 2 GeV/u. The measured cross sections indicate a dominant contribution of baryonic resonances. This is also consistent with a generalized scaling behaviour of the cross sections with the energy available in the collision and the energy necessary to produce particles as observed with Ne induced reactions. Deviations from scaling especially pronounced in the Ni-Ni system will be discussed in terms of absorption effects. The flat slope of the excitation function for ¯p production can be related to a reduced production threshold caused by a reduction of the antiproton mass in the dense and heated medium by about 100—150 MeV/c2. A similar in-medium mass reduction is also indicated forK− mesons. An increased ¯p reabsorption probability for the heavier systems is concluded from the comparison of the ¯p yields in Ne + NaF, Ne + Sn and Ni + Ni collisions.

8 data tables

Table 1

TARGET IS NAF.

Table 2

No description provided.

Table 3

No description provided.

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Composite particle production in relativistic Au + Pt, Si + Pt, and p + Pt collisions

The E886 collaboration Saito, N. ; Bassalleck, B. ; Burger, T. ; et al.

Phys.Rev.C 49 (1994) 3211-3218, 1994.

Inspire Record 383739 DOI 10.17182/hepdata.25998

Recently, highly relativistic Au beams have become available at the Brookhaven National Laboratory, Alternating Gradient Synchrotron. Inclusive production cross sections for composite particles, d, t, He3, and He4, in 11.5A GeV/c Au+Pt collisions have been measured using a beam line spectrometer. For comparison, composite particle production was also measured in Si+Pt and p+Pt collisions at similar beam momenta per nucleon (14.6A GeV/c and 12.9 GeV/c, respectively). The projectile dependence of the production cross section for each composite particle has been fitted to Aprojα. The parameter α can be described by a single function of the mass number and the momentum per nucleon of the produced particle. Additionally, the data are well described by momentum-space coalescence. Comparisons with similar analysis of Bevalac A+A data are made. The coalescence radii extracted from momentum-space coalescence fits are used to determine reaction volumes (‘‘source size’’) within the context of the Sato-Yazaki model.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Cumulative production of pi- mesons in pi C interactions at 40-GeV/c

Baatar, Ts. ; Batsaikhan, Ts. ; Ivanovskaya, I.A. ; et al.

Sov.J.Nucl.Phys. 52 (1990) 504-508, 1990.

Inspire Record 299082 DOI 10.17182/hepdata.38727

None

7 data tables

Table 1

HERE XL IS CUMULATIVE NUMBER, DEFINED AS FOLLOWS: (E-PL)/M(NUCLEON). THE DISTRIBUTION (1/N)*D(N)/D(XL) WAS FITTED BY THE SUM: CONST(1)* EXP(-SLOPE(1)*XL)+CONST(2)*EXP(-SLOPE(2)*XL).

Table 2

HERE XL IS CUMULATIVE NUMBER, DEFINED AS FOLLOWS: (E-PL)/M(NUCLEON). THE DISTRIBUTION (XL/N)*D(N)/D(XL) WAS FITTED BY THE SUM: CONST(1)* EXP(-SLOPE(1)*XL)+CONST(2)*EXP(-SLOPE(2)*XL).

Table 3

HERE XL IS CUMULATIVE NUMBER, DEFINED AS FOLLOWS: (E-PL)/M(NUCLEON).