Status and Performance of New Silicon Stripixel Detector for the PHENIX Experiment at RHIC: Beta Source, Cosmic-rays and Proton Beam at 120 GeV

Nouicer, R.; Akiba, Y.; Bennett, R.; Boyle, K; Cianciolo, V.; Deshpande, A.; Dion, A.; Eggleston, M. G.; Enokizono, A.; Kaneti, S.; Mannel, E.; Oglvie, C; Pei, H.; Sukhanov, A.; Taneja, S.; Togawa, M.

doi:10.1088/1748-0221/4/04/p04011

Cited by 10 publications

(12 citation statements)

References 10 publications

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“…The B2 (B3) layer comprises 16 (24) silicon stripixel ladders at a central radial distance of 11.8 (16.7) cm. The stripixel sensor is a novel silicon sensor, and is a single-sided, N-type, DC-coupled, twodimensional (2-D) sensitive detector [43,44]. One sensor has an active area of approximately 30 mm × 60 mm, which is divided into two independent sectors of 30 mm × 30 mm.…”

Section: The Vtx Detectormentioning

confidence: 99%

“…There are 30 A implants along the beam direction, connected to form a 30 mm long X-strip, and 30 B implants are connected with a stereo angle of 80 mrad to form a U-strip. X-strip and U-strip are visualized in [44]. When a charged particle hits a pixel, both the X-and the U-strip sharing the pixel register a hit.…”

Section: The Vtx Detectormentioning

confidence: 99%

“…The compositions of the pixel and strip are illustrated in [41,44]. The main characteristics of the VTX detector are summarized in Table I.…”

Section: The Vtx Detectormentioning

confidence: 99%

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Single electron yields from semileptonic charm and bottom hadron decays inAu+Aucollisions atsNN=200GeV

Adare¹,

Aidala²,

Ajitanand³

et al. 2016

Phys. Rev. C

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The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open heavy flavor production in minimum bias Au+Au collisions at √ s N N = 200 GeV via the yields of electrons from semileptonic decays of charm and bottom hadrons. Previous heavy flavor electron measurements indicated substantial modification in the momentum distribution of the parent heavy quarks due to the quark-gluon plasma created in these collisions. For the first time, using the PHENIX silicon vertex detector to measure precision displaced tracking, the relative contributions from charm and bottom hadrons to these electrons as a function of transverse momentum are measured in Au+Au collisions. We compare the fraction of electrons from bottom hadrons to previously published results extracted from electron-hadron correlations in p+p collisions at √ s N N = 200 GeV and find the fractions to be similar within the large uncertainties on both measurements for pT > 4 GeV/c. We use the bottom electron fractions in Au+Au and p+p along with the previously measured heavy flavor electron RAA to calculate the RAA for electrons from charm and bottom hadron decays separately. We find that electrons from bottom hadron decays are less suppressed than those from charm for the region 3 < pT < 4 GeV/c.

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Section: The Vtx Detectormentioning

confidence: 99%

Section: The Vtx Detectormentioning

confidence: 99%

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Single electron yields from semileptonic charm and bottom hadron decays inAu+Aucollisions atsNN=200GeV

Adare¹,

Aidala²,

Ajitanand³

et al. 2016

Phys. Rev. C

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“…In recent years, the PHENIX Collaboration has installed a silicon vertex tracker both in central rapidity (VTX) and in forward rapidity (FVTX) regions, and has collected large data samples [9,10]. These two silicon trackers enhance the capability of heavy flavor measurements via precision tracking.…”

Section: Latest Heavy Flavor Results From the Phenix Experiments At Rhicmentioning

confidence: 99%

“…The large suppression R AA of e ± HF at high-p T in Au + Au collisions at √ s NN = 200 GeV, shown in figures 2, and similar to that of light mesons π 0 , is the more striking because perturbative QCD calculations indicate a substantial contribution from bottom quark decays for p T > 5 GeV/c [15]. For the specific purpose of separating the contributions of charm and bottom quarks at mid-rapidity, the PHENIX Collaboration has added micro-vertexing capabilities in the form of a silicon vertex tracker (VTX) [9,10]. The different lifetimes and kinematics for charm and bottom hadrons decaying to electrons enable separation of their contributions with measurements of displaced tracks [18,19].…”

Section: Open Heavy Flavormentioning

confidence: 99%

Experimental Highlights: Heavy Quark Physics in Heavy-Ion Collisions at RHIC

Nouicer

2017

EPJ Web Conf.

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Abstract. The discovery at RHIC of large high-p T suppression and flow of electrons from heavy quarks flavors have altered our view of the hot and dense matter formed in central Au + Au collisions at √ s NN = 200 GeV. These results suggest a large energy loss and flow of heavy quarks in the hot, dense matter. In recent years, the RHIC experiments upgraded the detectors; (1) PHENIX Collaboration installed silicon vertex tracker (VTX) at midrapidity region and forward silicon vertex tracker (FVTX) at the forward rapidity region, and (2) STAR Collaboration installed the heavy flavor tracker (HFT) and the muon telescope detector (MTD) both at the mid-rapidity region. The PHENIX experiments established measurements of ψ(1S ) and ψ(2S ) production as a function of system size, p + p, p + Al, p + Au, and 3 He + Au collisions at √ s NN = 200 GeV. In p/ 3 He + A collisions at forward rapidity, we observe no difference in the ψ(2S )/ψ(1S ) ratio relative to p + p collisions. At backward rapidity, where the comoving particle density is higher, we find that the ψ(2S ) is preferentially suppressed by a factor of two. STAR Collaboration presents the first J/ψ measurements in the di-muon decay channel in Au + Au at √ s NN = 200 GeV at mid-rapidity. We observe a clear J/ψ R AA suppression and qualitatively well described by transport models, including dissociation and regeneration simultaneously. Physics MotivationHadrons conveying heavy quarks, i.e. charm (c) or bottom (b), are consider important probes of the hot and dense medium, Quark Gluon Plasma (QGP), created in relativistic heavy-ion collisions. Heavy quark-antiquark pairs are mainly produced in initial hard scattering processes of partons. While some of the produced pairs form bound quarkonia, the vast majority hadronize into open heavy flavor particles. They interact through the medium and are expected to be sensitive to its energy density through the mechanism of parton energy loss. Due to the large mass of heavy quarks the suppression of small-angle gluon radiation should reduce their energy loss, and consequently any suppression of heavy-quark mesons like D and B mesons at high-p T is expected to be smaller than that observed for hadrons consisting of light quarks [1]. The evolution of the nuclear modification factor for charged hadrons and π 0 with center-of-mass energy, from the SPS to RHIC and then to the LHC is presented in figure 1. We observe that in the presented p T region, charged hadron production at the LHC is found to be about 50% more suppressed than at RHIC, and has a similar suppression value as for neutral pions (π 0 ) measured by PHENIX. a

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Effect of multiple coulomb scattering on the beam tests of silicon pixel detectors

Li,

Dong,

Gao

et al. 2024

NUCL SCI TECH

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Status and Performance of New Silicon Stripixel Detector for the PHENIX Experiment at RHIC: Beta Source, Cosmic-rays and Proton Beam at 120 GeV

Cited by 10 publications

References 10 publications

Single electron yields from semileptonic charm and bottom hadron decays inAu+Aucollisions atsNN=200GeV

Single electron yields from semileptonic charm and bottom hadron decays inAu+Aucollisions atsNN=200GeV

Experimental Highlights: Heavy Quark Physics in Heavy-Ion Collisions at RHIC

Effect of multiple coulomb scattering on the beam tests of silicon pixel detectors

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