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Jet-associated deuteron production in pp collisions at s=13 TeV

The collaboration
Phys.Lett.B 819 (2021) 136440, 2021.

Abstract (data abstract)
CERN-LHC. Deuteron production in high-energy collisions is sensitive to the space-time evolution of the collision system, and is typically described by a coalescence mechanism. For the first time, we present results on jet-associated deuteron production in pp collisions at $\sqrt{s}=13$ TeV, providing an opportunity to test the established picture for deuteron production in events with a hard scattering. Using a trigger particle with high transverse-momentum~($p_{\rm T}>5$ GeV/$c$) as a proxy for the presence of a jet at mid-rapidity, we observe a measurable population of deuterons being produced around the jet proxy. The associated deuteron yield measured in a narrow angular range around the trigger particle differs by 2--3 standard deviations from the uncorrelated background. The data are described by PYTHIA model calculations featuring baryon coalescence.

• #### Table 1

Data from Fig. 2 (1.0-1.35)

10.17182/hepdata.105975.v1/t1

The per-trigger associated yield versus $\Delta\varphi$ for charged particles with $p_{\rm T}>5.0$ GeV/$c$ and associate deuterons and anti-deuterons for 1.0-1.35...

• #### Table 2

Data from Fig. 2 (1.35-1.80)

10.17182/hepdata.105975.v1/t2

The per-trigger associated yield versus $\Delta\varphi$ for charged particles with $p_{\rm T}>5.0$ GeV/$c$ and associate deuterons and anti-deuterons for 1.35-1.8...

• #### Table 3

Data from Fig. 2 (1.80-2.40)

10.17182/hepdata.105975.v1/t3

The per-trigger associated yield versus $\Delta\varphi$ for charged particles with $p_{\rm T}>5.0$ GeV/$c$ and associate deuterons and anti-deuterons for 1.8-2.4...

• #### Table 4

Data from Fig. 2 (2.40-3.00)

10.17182/hepdata.105975.v1/t4

The per-trigger associated yield versus $\Delta\varphi$ for charged particles with $p_{\rm T}>5.0$ GeV/$c$ and associate deuterons and anti-deuterons for 2.4-3.0...

• #### Table 5

Data from Fig. 2 (3.00-4.00)

10.17182/hepdata.105975.v1/t5

The per-trigger associated yield versus $\Delta\varphi$ for charged particles with $p_{\rm T}>5.0$ GeV/$c$ and associate deuterons and anti-deuterons for 3.0-4.0...

• #### Table 6

Data from Fig. 3 : The per-trigger associated-deuteron integrated yield for trigger particles above 5 GeV/$c$ on the near side versus $p_{\rm T}$ of the associated deuterons and anti-deuterons. Statistical, systematic and uncertainties from ZYAM are given.

10.17182/hepdata.105975.v1/t6