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Production of associated Y and open charm hadrons in pp collisions at $\sqrt{s}=7$ and 8 TeV via double parton scattering

The collaboration
JHEP 1607 (2016) 052, 2016

Abstract (data abstract)
CERN-LHCb. Associated production of bottomonia and open charm hadrons in $pp$ collisions at $\sqrt{s}=7$ and $8$TeV is observed using data corresponding to an integrated luminosity of 3 fb$^{-1}$ accumulated with the LHCb detector. The observation of five combinations, $\Upsilon(1S)D^0$, $\Upsilon(2S)D^0$, $\Upsilon(1S)D^+$, $\Upsilon(2S)D^+$ and $\Upsilon(1S)D^+_s$, is reported. Production cross-sections are measured for $\Upsilon(1S)D^0$ and $\Upsilon(1S)D^+$pairs in the forward region. The measured cross-sections and the differential distributions indicate the dominance of double parton scattering as the main production mechanism. This allows a precise measurement of the effective cross-section for double parton scattering. $\Upsilon$ mesons are recontructed using $\Upsilon \to \mu^+ \mu^-$ decay mode, while for charm hadrons $D^0 \to K^- \pi^+$, $D^+ \to K^- \pi^+ \pi^+$, $D^+_s \to K^- K^+ \pi^+$ and $\Lambda_c \to K^- \pi^+$ decay modes are used.

• Table 1

Data from Figure 7(a), red filled circles

10.17182/hepdata.73583.v1/t1

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} p_T(\Upsilon(1S))}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 2

Data from Figure 7(b), red filled circles

10.17182/hepdata.73583.v1/t2

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} p_T(\Upsilon(1S))}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 3

Data from Figure 7(c), red filled circles

10.17182/hepdata.73583.v1/t3

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} p_T(D^0)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 4

Data from Figure 7(d), red filled circles

10.17182/hepdata.73583.v1/t4

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} p_T(D^+)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 5

Data from Figure 8(a), red filled circles

10.17182/hepdata.73583.v1/t5

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} y(\Upsilon(1S))}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 6

Data from Figure 8(b), red filled circles

10.17182/hepdata.73583.v1/t6

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} y(\Upsilon(1S))}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 7

Data from Figure 8(c), red filled circles

10.17182/hepdata.73583.v1/t7

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} y(D^0)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 8

Data from Figure 8(d), red filled circles

10.17182/hepdata.73583.v1/t8

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} y(D^+)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 9

Data from Figure 9(a), red filled circles

10.17182/hepdata.73583.v1/t9

Normalized differential cross-section $\frac{\pi}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} \left| \Delta \phi \right| }$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted...

• Table 10

Data from Figure 9(b), red filled circles

10.17182/hepdata.73583.v1/t10

Normalized differential cross-section $\frac{\pi}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} \left| \Delta \phi \right| }$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted...

• Table 11

Data from Figure 9(c), red filled circles

10.17182/hepdata.73583.v1/t11

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} \left| \Delta y \right| }$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted...

• Table 12

Data from Figure 9(d), red filled circles

10.17182/hepdata.73583.v1/t12

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} \left| \Delta y \right| }$ for $2<y(\Upsilon(1S))<4.5$, for $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are...

• Table 13

Data from Figure 10(a), red filled circles

10.17182/hepdata.73583.v1/t13

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} p_T(\Upsilon(1S)D^0) }$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties...

• Table 14

Data from Figure 10(b), red filled circles

10.17182/hepdata.73583.v1/t14

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} p_T(\Upsilon(1S)D^+)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 15

Data from Figure 10(c), red filled circles

10.17182/hepdata.73583.v1/t15

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} y(\Upsilon(1S)D^0) }$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties...

• Table 16

Data from Figure 10(d), red filled circles

10.17182/hepdata.73583.v1/t16

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} y(\Upsilon(1S)D^+)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

• Table 17

Data from Figure 11(a), red filled circles

10.17182/hepdata.73583.v1/t17

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} \mathcal{A}_T }$, where $\mathcal{A}_T = \frac{p_T(\Upsilon(1S))-p_T(D^0)}{p_T(\Upsilon(1S))-p_T(D^0)}$, for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are...

• Table 18

Data from Figure 11(b), red filled circles

10.17182/hepdata.73583.v1/t18

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} \mathcal{A}_T }$, where $\mathcal{A}_T = \frac{p_T(\Upsilon(1S))-p_T(D^0)}{p_T(\Upsilon(1S))-p_T(D^0)}$, for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are...

• Table 19

Data from Figure 11(c), red filled circles

10.17182/hepdata.73583.v1/t19

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^0)}{\mathrm{d} m(\Upsilon(1S)D^0) }$, for $2<y(\Upsilon(1S))<4.5$, $2<y(D^0)<4.5$, $p_T(D^0)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties...

• Table 20

Data from Figure 11(d), red filled circles

10.17182/hepdata.73583.v1/t20

Normalized differential cross-section $\frac{1}{\sigma}\frac{ \mathrm{d}\sigma(\Upsilon(1S)D^+)}{\mathrm{d} m(\Upsilon(1S)D^+)}$ for $2<y(\Upsilon(1S))<4.5$, $2<y(D^+)<4.5$, $p_T(D^+)>1$ GeV/$c$. Only statistical uncertainties are quoted as systematic uncertainties are...

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