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Azimuthal angle (Delta phi) correlations are presented for a broad range of transverse momentum (0.4 < pT < 10 GeV/c) and centrality (0-92%) selections for charged hadrons from di-jets in Au+Au collisions at sqrt(s_NN) = 200 GeV. With increasing pT, the away-side Delta phi distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons to p+p data suggest that the away-side distribution can be divided into a partially suppressed head region centered at Delta phi ~ \pi, and an enhanced shoulder region centered at Delta phi ~ \pi \pm 1:1. The pT spectrum for the associated hadrons in the head region softens toward central collisions. The spectral slope for the shoulder region is independent of centrality and trigger pT . The properties of the near-side distributions are also modified relative to those in p + p collisions, reflected by the broadening of the jet shape in Delta phi and Delta eta, and an enhancement of the per-trigger yield. However, these modifications seem to be limited to pT < 4 GeV/c, above which both the dihadron pair shape and per-trigger yield become similar to p + p collisions. These observations suggest that both the away- and near-side distributions contain a jet fragmentation component which dominates for pT \ge 5GeV and a medium-induced component which is important for pT \le 4 GeV/c. We also quantify the role of jets at intermediate and low pT through the yield of jet-induced pairs in comparison to binary scaled p + p pair yield. The yield of jet-induced pairs is suppressed at high pair proxy energy (sum of the pT magnitudes of the two hadrons) and is enhanced at low pair proxy energy. The former is consistent with jet quenching/ the latter is consistent with the enhancement of soft hadron pairs due to transport of lost energy to lower pT.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in p + p collisions for 5-10 $\otimes$ 2-3, 4-5 $\otimes$ 4-5, 5-10 $\otimes$ 3-5, and 5-10 $\otimes$ 5-10 GeV/c.
The 0-20% Au+Au jet-induced hadron-pair yield $\Delta\phi$ distributions calculated from the per-trigger yield using low-$p_T$ hadrons as triggers and high-$p_T$ hadrons as triggers. Data for 2 - 3 GeV/$c$.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in p + p collisions for 3-4 $\otimes$ 0.4-1, 3-4 $\otimes$ 1-2, 3-4 $\otimes$ 2-3, and 3-4 $\otimes$ 3-4 GeV/c.
The 0-20% Au+Au jet-induced hadron-pair yield $\Delta\phi$ distributions calculated from the per-trigger yield using low-$p_T$ hadrons as triggers and high-$p_T$ hadrons as triggers. Data for 3 - 4 GeV/$c$.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in Au + Au collisions for 3-4 $\otimes$ 0.4-1, 3-4 $\otimes$ 1-2, 3-4 $\otimes$ 2-3, and 3-4 $\otimes$ 3-4 GeV/c.
The 0-20% Au+Au jet-induced hadron-pair yield $\Delta\phi$ distributions calculated from the per-trigger yield using low-$p_T$ hadrons as triggers and high-$p_T$ hadrons as triggers. Data for 4 - 5 GeV/$c$.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in Au + Au collisions for 5-10 $\otimes$ 2-3, 4-5 $\otimes$ 4-5, 5-10 $\otimes$ 3-5, and 5-10 $\otimes$ 5-10 GeV/c.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in p + p collisions for 5-10 $\otimes$ 2-3, 4-5 $\otimes$ 4-5, 5-10 $\otimes$ 3-5, and 5-10 $\otimes$ 5-10 GeV/c.
RHS versus $p^b_T$ for p + p collisions for four trigger selections.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in p + p collisions for 3-4 $\otimes$ 0.4-1, 3-4 $\otimes$ 1-2, 3-4 $\otimes$ 2-3, and 3-4 $\otimes$ 3-4 GeV/c.
RHS versus $p^b_T$ for Au + Au collisions for four trigger selections.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in Au + Au collisions for 3-4 $\otimes$ 0.4-1, 3-4 $\otimes$ 1-2, 3-4 $\otimes$ 2-3, and 3-4 $\otimes$ 3-4 GeV/c.
RHS versus $N_{part}$ for 2-3 $\otimes$ 2-3 GeV/$c$. Shaded bars (brackets) represent $p_T$ -correlated uncertainties due to elliptic flow (ZYAM procedure). The most left point is from p+p.
Per-trigger yield versus $\Delta\phi$ for various trigger and partner $p_T$ ($p^a_T \otimes p^b_T$), arranged by increasing pair proxy energy (sum of $p^a_T$ and $p^b_T$), in Au + Au collisions for 5-10 $\otimes$ 2-3, 4-5 $\otimes$ 4-5, 5-10 $\otimes$ 3-5, and 5-10 $\otimes$ 5-10 GeV/c.
Per-trigger yield $\Delta\phi$ distribution and corresponding fits for 2-3 $\otimes$ 2-3 GeV/c in 0-5% Au+Au collisions.
RHS versus $p^b_T$ for p + p collisions for four trigger selections.
a) D versus centrality from FIT 1 and FIT2 for 2 - 3 GeV/$c$ bin. The error bars are the statistical errors; The shaded bars and brackets are the systematic errors due to $v_2$. b) The fraction of the shoulder Gaussian yield relative to the total away-side yield as function of centrality determined from FIT2.
RHS versus $p^b_T$ for Au + Au collisions for four trigger selections.
Values of D determined from FIT1 as function of partner $p_T$ for 2-3 GeV/c $p_T$ range in 0-20% Au+Au.
RHS versus $N_{part}$ for 2-3 $\otimes$ 2-3 GeV/$c$. Shaded bars (brackets) represent $p_T$ -correlated uncertainties due to elliptic flow (ZYAM procedure). The most left point is from p+p.
Values of D determined from FIT1 as function of partner $p_T$ for 3-4 GeV/c $p_T$ range in 0-20% Au+Au.
Per-trigger yield $\Delta\phi$ distribution and corresponding fits for 2−3 $\otimes$ 2−3 GeV/c in 0-5% Au+Au collisions.
Values of D determined from FIT1 as function of partner $p_T$ for 4-5 GeV/c $p_T$ range in 0-20% Au+Au.
a) D versus $N_{part}$ from FIT 1 and FIT2 for 2 - 3 GeV/$c$ bin. The error bars are the statistical errors; The shaded bars and brackets are the systematic errors due to $v_2$. b) The fraction of the shoulder Gaussian yield relative to the total away-side yield as function of $N_{part}$ determined from FIT2.
Values of D determined from FIT2 as function of partner $p_T$ for 2-3 GeV/c $p_T$ range in 0-20% Au+Au.
Values of D determined from FIT1 as function of partner $p_T$ for 2-3 GeV/c $p_T$ range in 0-20% Au+Au.
Values of D determined from FIT2 as function of partner $p_T$ for 3-4 GeV/c $p_T$ range in 0-20% Au+Au.
Values of D determined from FIT1 as function of partner $p_T$ for 3-4 GeV/c $p_T$ range in 0-20% Au+Au.
Values of D determined from FIT2 as function of partner $p_T$ for 4-5 GeV/c $p_T$ range in 0-20% Au+Au.
Values of D determined from FIT1 as function of partner $p_T$ for 4-5 GeV/c $p_T$ range in 0-20% Au+Au.
Per-trigger yield as function of partner $p_T$ for the HR region for the 0-20% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Values of D determined from FIT2 as function of partner $p_T$ for 2-3 GeV/c $p_T$ range in 0-20% Au+Au.
Per-trigger yield as function of partner $p_T$ for the HR region for the 20-40% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Values of D determined from FIT2 as function of partner $p_T$ for 3-4 GeV/c $p_T$ range in 0-20% Au+Au.
Per-trigger yield as function of partner $p_T$ for the HR region for the 40-60% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Values of D determined from FIT2 as function of partner $p_T$ for 4-5 GeV/c $p_T$ range in 0-20% Au+Au.
Per-trigger yield as function of partner $p_T$ for the HR region for the 60-92% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the HR region for the 0-20% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the HR region for the p + p collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the HR region for the 20-40% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the 0-20% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the HR region for the 40-60% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the 20-40% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the HR region for the 60-92% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the 40-60% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the HR region for the p + p collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the 60-92% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the 0-20% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the p + p collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Per-trigger yield as function of partner $p_T$ for the SR region for the 20-40% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Near-side Gaussian widths versus partner $p_T$ for four trigger $p_T$ ranges for 0-20 % Au + Au.
Per-trigger yield as function of partner $p_T$ for the SR region for the 40-60% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Near-side Gaussian widths versus partner $p_T$ for four trigger $p_T$ ranges for 0-20 % p + p.
Per-trigger yield as function of partner $p_T$ for the SR region for the 60-92% Au + Au collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Near-side Gaussian widths versus $N_{part}$ for five successively increasing $p^a_T$ $\otimes$ $p^b_T$. The most left point in each panel represents the value from p + p.
Per-trigger yield as function of partner $p_T$ for the SR region for the p + p collisions. Results for four trigger pT in 2-3, 3-4, 4-5, 5-10 GeV/c are shown.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% p + p.
Near-side Gaussian widths versus partner $p_T$ for four trigger $p_T$ ranges for 0-20 % Au + Au.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% Au + Au.
Near-side Gaussian widths versus partner $p_T$ for four trigger $p_T$ ranges for 0-20 % p + p.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% Au + Au.
Near-side Gaussian widths versus $N_{part}$ for five successively increasing $p^a_T$ $\otimes$ $p^b_T$. The most left point in each panel represents the value from p + p.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% Au + Au.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% p + p.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% Au + Au.
Near-side yield in $\lvert \Delta\phi \rvert$ < $\pi$/3 versus partner $p_T$ for four trigger $p_T$ selections for 0-20% Au + Au.
Per-trigger yield versus $\Delta\eta$ for 0-20% central Au + Au collisions. Results are shown for four $p^a_T \otimes p^b_T$ selections as indicated.
Per-trigger yield versus $\Delta\eta$ for 0-20% central Au + Au collisions. Results are shown for four $p^a_T \otimes p^b_T$ selections as indicated.
Per-trigger yield versus $\Delta\eta$ for 0-20% central p + p collisions. Results are shown for four $p^a_T \otimes p^b_T$ selections as indicated.
Per-trigger yield versus $\Delta\eta$ for 0-20% central p + p collisions. Results are shown for four $p^a_T \otimes p^b_T$ selections as indicated.
The projection of 2-D per-trigger yield in $\lvert \Delta\eta \rvert$ < 0.7 $\otimes$ $\lvert \Delta\phi \rvert$ < 0.7 and 0-20% central Au+Au collisions onto $\Delta\eta$ for four $p^a_T \otimes p^b_T$ selections.
The projection of 2-D per-trigger yield in $\lvert \Delta\eta \rvert$ < 0.7 $\otimes$ $\lvert \Delta\phi \rvert$ < 0.7 and 0-20% central Au+Au collisions onto $\Delta\eta$ for four $p^a_T \otimes p^b_T$ selections.
The projection of 2-D per-trigger yield in $\lvert \Delta\eta \rvert$ < 0.7 $\otimes$ $\lvert \Delta\phi \rvert$ < 0.7 and 0-20% central Au+Au collisions onto $\Delta\phi$ for four $p^a_T \otimes p^b_T$ selections.
The projection of 2-D per-trigger yield in $\lvert \Delta\eta \rvert$ < 0.7 $\otimes$ $\lvert \Delta\phi \rvert$ < 0.7 and 0-20% central Au+Au collisions onto $\Delta\phi$ for four $p^a_T \otimes p^b_T$ selections.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus centrality for the head region for Au + Au for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus $N_{part}$ for the head region for Au + Au and p + p for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus centrality for the away-side shoulder region for Au + Au for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus $N_{part}$ for the away-side shoulder region for Au + Au and p + p for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus centrality for the near-side region for Au + Au for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus $N_{part}$ for the near-side region for Au + Au and p + p for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus centrality for the head region for p + p for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, calculated for five partner pT ranges in the HR. Results for triggers in 3 − 4 GeV/c.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus centrality for the away-side shoulder region for p + p for four trigger $p_T$ bins.
Truncated mean $p_T$, $\langle p_T \rangle$, calculated for five partner pT ranges in the HR. Results for triggers in 4 − 5 GeV/c.
Truncated mean $p_T$, $\langle p_T \rangle$, in 1 <pbT < 5 GeV/c versus centrality for the near-side region for p + p for four trigger $p_T$ bins.
The near-side pair suppression factor $J_{AA}$ in 0-20% Au + Au collisions as function of $p^b_T$ for various ranges of $p^a_T$.
Truncated mean $p_T$, $\langle p_T \rangle$, calculated for five partner pT ranges in the HR. Results for triggers in 3-4 GeV/c.
The near-side $J_{AA}$ as function of $p^b_T$ and $p^{sum}_T$ for four $p^a_T$ bins and three centrality bins. Data for 20-40%.
Truncated mean $p_T$, $\langle p_T \rangle$, calculated for five partner pT ranges in the HR. Results for triggers in 4-5 GeV/c.
The near-side $J_{AA}$ as function of $p^b_T$ and $p^{sum}_T$ for four $p^a_T$ bins and three centrality bins. Data for 40-60%.
Truncated mean $p_T$, $\langle p_T \rangle$, calculated for five partner pT ranges in the HR. Results for triggers in 3-4 GeV/c.
The near-side $J_{AA}$ as function of $p^b_T$ and $p^{sum}_T$ for four $p^a_T$ bins and three centrality bins. Data for 60-92%.
Truncated mean $p_T$, $\langle p_T \rangle$, calculated for five partner pT ranges in the HR. Results for triggers in 4-5 GeV/c.
The pair suppression factor $J_{AA}$ for the away-side HR in 0-20% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
The near-side pair suppression factor $J_{AA}$ in 0-20% Au + Au collisions as function of $p^b_T$ for various ranges of $p^a_T$.
The pair suppression factor $J_{AA}$ for the away-side HR in 20-40% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
The near-side $J_{AA}$ as function of $p^b_T$ and $p^{sum}_T$ for four $p^a_T$ bins and three centrality bins. Data for 20-40%.
The pair suppression factor $J_{AA}$ for the away-side HR in 40-60% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
The near-side $J_{AA}$ as function of $p^b_T$ and $p^{sum}_T$ for four $p^a_T$ bins and three centrality bins. Data for 40-60%.
The pair suppression factor $J_{AA}$ for the away-side HR in 60-92% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
The near-side $J_{AA}$ as function of $p^b_T$ and $p^{sum}_T$ for four $p^a_T$ bins and three centrality bins. Data for 60-92%.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 0-20 % Au + Au collisions.
The pair suppression factor $J_{AA}$ for the away-side HR in 0-20% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in p + p collisions.
The pair suppression factor $J_{AA}$ for the away-side HR in 20-40% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 20-40 % Au + Au collisions.
The pair suppression factor $J_{AA}$ for the away-side HR in 40-60% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in p + p collisions.
The pair suppression factor $J_{AA}$ for the away-side HR in 60-92% Au + Au collisions as function of $p_b^T$ for various ranges of $p_a^T$.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 60-92 % Au + Au collisions.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 0-20 % Au + Au collisions.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in p + p collisions.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 20-40 % Au + Au collisions.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 40-60 % Au + Au collisions.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in 60-92 % Au + Au collisions.
Per-trigger yield versus $\Delta\phi$ for successively increasing trigger and partner $p_T$ ($p^a_T \otimes p^b_T$) in p + p collisions.
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