Abstract (data abstract)

A measurement of the inclusive b-jet production cross section is presented in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}~=0.5~$TeV, using data collected with the ALICE detector at the LHC. The jets were reconstructed in the central rapidity region $|\eta|<0.5$ from charged particles using the anti-$k_{\rm T}$ algorithm with resolution parameter $R=0.4$. Identification of b jets exploits the long lifetime of b-hadrons, using the properties of secondary vertices and impact parameter distributions. The $p_\mathrm{T}$-differential inclusive production cross section of b jets, as well as the corresponding inclusive b-jet fraction, are reported for pp and p-Pb collisions in the jet transverse momentum range $10 \le p_\mathrm{T,ch\,jet} \le 100$ GeV/$c$, together with the nuclear modification factor, $R_{\rm pPb}^\text{b-jet}$. The analysis thus extends the lower $p_\mathrm{T}$ limit of b-jet measurements at the LHC. The nuclear modification factor is found to be consistent with unity, indicating that the production of b jets in p-Pb at $\sqrt{s_{\mathrm{NN}}}~=0.5~$TeV is not affected by cold nuclear matter effects within the current precision. The measurements are well reproduced by POWHEG NLO pQCD calculations with PYTHIA fragmentation.

Table 1

Table from Figure 11

10.17182/hepdata.128018.v1/t1

Fig. 11 left: The $p_\mathrm{T}$ differential production cross section of charged-particle anti-$k_{T}$ $R=0.4$ b jets in pp collisions at $\sqrt{s}~=~5.02$...
Table 2

Table from Figure 11

10.17182/hepdata.128018.v1/t2

Fig. 11 left: The $p_\mathrm{T}$ differential production cross section of charged-particle anti-$k_{T}$ $R=0.4$ b jets in pp collisions at $\sqrt{s}~=~5.02$...
Table 3

Table from Figure 11

10.17182/hepdata.128018.v1/t3

Fig. 11 right: The $p_\mathrm{T}$ differential production cross section of charged-particle anti-$k_{T}$ $R=0.4$ b jets in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}~=~5.02$...
Table 4

Table from Figure 11

10.17182/hepdata.128018.v1/t4

Fig. 11 right: The $p_\mathrm{T}$ differential production cross section of charged-particle anti-$k_{T}$ $R=0.4$ b jets in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}~=~5.02$...
Table 5

Table from Figure 12

10.17182/hepdata.128018.v1/t5

Fig. 12 left: The combined differential production cross section of charged-particle anti-$k_{T}$ $R=0.4$ b jets in pp collisions at $\sqrt{s}~=~5.02$...
Table 6

Table from Figure 12

10.17182/hepdata.128018.v1/t6

Fig. 12 right: The combined differential production cross section of charged-particle anti-$k_{T}$ $R=0.4$ b jets in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}~=~5.02$...
Table 7

Table from Figure 13

10.17182/hepdata.128018.v1/t7

Fig. 13 left: The b-jet fraction in pp collisions at $\sqrt{s}~=~5.02$ TeV.
Table 8

Table from Figure 13

10.17182/hepdata.128018.v1/t8

Fig. 13 right: The b-jet fraction in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}~=~5.02$ TeV.
Table 9

Table from Figure 14

10.17182/hepdata.128018.v1/t9

Fig. 14 left: The nuclear modification factor $R_{\mathrm{pPb}}$ of b jets as a function of $P_T$ from the SV method.
Table 10

Table from Figure 14

10.17182/hepdata.128018.v1/t10

Fig. 14 left: The nuclear modification factor $R_{\mathrm{pPb}}$ of b jets as a function of $P_T$ from the IP method.
Table 11

Table from Figure 14

10.17182/hepdata.128018.v1/t11

Fig. 14 right: The combined nuclear modification factor $R_{\mathrm{pPb}}$ of b jets as a function of $P_T$.

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

JSON

YAML

YODA

ROOT

CSV

Visualize

Ask a Question