scholarly journals Effect of Hadron Contamination on Dielectron Signal Reconstruction in Heavy Flavor Production Measurements

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Daniel Kikoła
Keyword(s):  
Time Projection Chamber ◽  
Signal Reconstruction ◽  
Particle Identification ◽  
Heavy Flavor ◽  
Reconstruction Process ◽  
Identification Process ◽  
Heavy Flavor Production ◽  
Time Projection

Dielectron signal reconstruction is an important tool for heavy flavor measurements because of its trigger feasibility and its relatively straightforward particle identification process. However, in the case of time projection chamber detectors, some hadron contamination is unavoidable, even if additional means are used to improve the particle identification process. In this paper, we investigate the effects of hadron (protons, pions, and kaons) contamination on the dielectron signal reconstruction process in the measurement ofJ/ψand electrons from heavy flavor hadron decays.

scholarly journals π± Spectra in Au+Au Collisions at $\sqrt{s_{\rm NN}}=62.4\ {\rm GeV}$

2005 ◽  
Vol 20 (16) ◽  
pp. 3783-3785 ◽  
Author(s):  
◽  
Zhangbu Xu
Keyword(s):  
Transverse Momentum ◽  
Energy Loss ◽  
Ionization Energy ◽  
Time Projection Chamber ◽  
Time Of Flight ◽  
Particle Identification ◽  
Resistive Plate Chamber ◽  
Ionization Energy Loss ◽  
Charged Pions ◽  
Time Projection

The combination of the ionization energy loss (dE/dx) from Time Projection Chamber (TPC) at ≃ 8% resolution and multi-gap resistive plate chamber time-of-flight (TOF) at 85ps provides powerful particle identification. We present spectra of identified charged pions from transverse momentum pT≃0.2 GeV/c to 7-8 GeV/c in Au + Au collisions at [Formula: see text]. Physics implications will be discussed.

PROJECTION OF A MEASUREMENT OF THE NONPHOTONIC ELECTRON v2 IN Au + Au COLLISIONS AT STAR

2011 ◽  
Vol 20 (08) ◽  
pp. 1701-1708
Author(s):  
BING-CHU HUANG ◽  
YI-FEI ZHANG ◽  
ZI-PING ZHANG ◽  
ZHANG-BU XU ◽  
XIN DONG
Keyword(s):  
Invariant Mass ◽  
Time Projection Chamber ◽  
Time Of Flight ◽  
Heavy Flavor ◽  
Combinatorial Background ◽  
Plane Method ◽  
Event Plane ◽  
Quark Decays ◽  
Time Projection ◽  
Star Detector

We present a method of measuring the elliptic flow (v2) of nonphotonic electrons from heavy flavor quark decays using the STAR detector at RHIC in Au + Au collisions at [Formula: see text]. Inclusive electrons are identified in the pT range 0.5–4 GeV /c at mid-rapidity -1 < η < 0 by the STAR time projection chamber (TPC) and time-of-flight detector. Photonic e+e- pairs with characteristic low invariant mass are reconstructed in the TPC and their v2 is measured using the standard event plane method by subtracting the combinatorial background in the dN/dΔϕ distributions in each pT bin. The nonphotonic electron v2 and its propagated error can be derived from the inclusive and photonic electron v2. We estimate the necessary statistics and errors of nonphotonic electron v2 for a more recent RHIC run.

scholarly journals Directional Dark Matter Searches with CYGNO

Particles ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 343-353
Author(s):  
Fernando Domingues Amaro ◽  
Elisabetta Baracchini ◽  
Luigi Benussi ◽  
Stefano Bianco ◽  
Cesidio Capoccia ◽  
...  
Keyword(s):  
Dark Matter ◽  
Atmospheric Pressure ◽  
Time Projection Chamber ◽  
Negative Ion ◽  
Cmos Camera ◽  
Resolution Time ◽  
3D Tracking ◽  
Ion Drift ◽  
Optical Readout ◽  
Time Projection

The CYGNO project aims at developing a high resolution Time Projection Chamber with optical readout for directional dark matter searches and solar neutrino spectroscopy. Peculiar CYGNO’s features are the 3D tracking capability provided by the combination of photomultipliers and scientific CMOS camera signals, combined with a helium-fluorine-based gas mixture at atmospheric pressure amplified by gas electron multipliers structures. In this paper, the performances achieved with CYGNO prototypes and the prospects for the upcoming underground installation at Laboratori Nazionali del Gran Sasso of a 50-L detector in fall 2021 will be discussed, together with the plans for a 1-m3 experiment. The synergy with the ERC consolidator, grant project INITIUM, aimed at realising negative ion drift operation within the CYGNO 3D optical approach, will be further illustrated.

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