Open Charm Measurements at CERN SPS Energies with the New Vertex Detector of the NA61/SHINE Experiment

The study of open charm meson production provides an efficient tool for detailed investigations of the properties of hot and dense matter formed in nucleus-nucleus collisions. The interpretation of the existing data from the CERN SPS suffers from a lack of knowledge on the total charm production rate. To overcome this limitation the heavy-ion programme of the NA61/SHINE experiment at CERN SPS has been expanded to allow for precise measurements of particles with a short lifetime. A new Small Acceptance Vertex Detector (SAVD) was designed and constructed to meet the challenges of open charm measurements in nucleus-nucleus collisions. SAVD was installed in December 2016 for data taking with Pb+Pb collisions at 150A GeV/c. An exploratory set of collected data allowed to validate the general concept of the D0 mesons detection via its D0→π++K- decay channel and delivered the first direct observation of open charm at SPS energies. In October and November of 2017 a large statistic data set has been taken for Xe+La at 150A, 75A, and 40A GeV/c, these data are currently under intense analysis. The physics motivation behind the open charm measurements at the SPS energies will be discussed. Moreover, the concept of the SAVD hardware and status of the analysis will be shown. Also, the future plans of open charm measurements in the NA61/SHINE experiment related to the upgraded Vertex Detector will be presented.

Download Full-text

Open Charm Measurements at CERN SPS Energies with the New Vertex Detector of the NA61/SHINE Experiment: Status and Plans

Universe ◽

10.3390/universe5010014 ◽

2019 ◽

Vol 5 (1) ◽

pp. 14 ◽

Cited By ~ 1

Author(s):

Anastasia Merzlaya ◽

Keyword(s):

Decay Channel ◽

Meson Production ◽

Dense Matter ◽

Heavy Ion ◽

Open Charm ◽

Proton Synchrotron ◽

Super Proton Synchrotron ◽

Vertex Detector ◽

Exploratory Data ◽

Future Plans

The study of open charm meson production provides an efficient tool for detailed investigations of the properties of hot and dense matter formed in nucleus-nucleus collisions. The interpretation of the existing data from the CERN Super Proton Synchrotron (SPS) suffers from a lack of knowledge about the total charm production rate. To overcome this limitation, the heavy-ion program of the NA61/SHINE experiment at the CERN SPS has been upgraded to allow for precise measurements of particles with a short lifetime. A new vertex detector (Small Acceptance version of the Vertex Detector (SAVD)) was constructed to meet the challenges of open charm measurements in nucleus-nucleus collisions. The first exploratory data taking of Pb + Pb collisions at 150A GeV/c with the SAVD was performed in 2016, and a D 0 signal was extracted in its D 0 → π + + K − decay channel. This was the first, direct observation of open charm in nucleus-nucleus collisions at the SPS energies. Furthermore, the future plans of open charm measurements in the NA61/SHINE experiment related to the upgraded version of the Vertex Detector are discussed.

Download Full-text

A Review onϕMeson Production in Heavy-Ion Collision

Advances in High Energy Physics ◽

10.1155/2015/197930 ◽

2015 ◽

Vol 2015 ◽

pp. 1-16 ◽

Cited By ~ 10

Author(s):

Md. Nasim ◽

Vipul Bairathi ◽

Mukesh Kumar Sharma ◽

Bedangadas Mohanty ◽

Anju Bhasin

Keyword(s):

Hadron Collider ◽

Center Of Mass ◽

Meson Production ◽

Dense Matter ◽

Heavy Ion ◽

Experimental Program ◽

Proton Synchrotron ◽

Relativistic Heavy Ion Collider ◽

Super Proton Synchrotron ◽

Strangeness Enhancement

The main aim of the relativistic heavy-ion experiment is to create extremely hot and dense matter and study the QCD phase structure. With this motivation, experimental program started in the early 1990s at the Brookhaven Alternating Gradient Synchrotron (AGS) and the CERN Super Proton Synchrotron (SPS) followed by Relativistic Heavy Ion Collider (RHIC) at Brookhaven and recently at Large Hadron Collider (LHC) at CERN. These experiments allowed us to study the QCD matter from center-of-mass energies (sNN) 4.75 GeV to 2.76 TeV. Theϕmeson, due to its unique properties, is considered as a good probe to study the QCD matter created in relativistic collisions. In this paper we present a review on the measurements ofϕmeson production in heavy-ion experiments. Mainly, we discuss the energy dependence ofϕmeson invariant yield and the production mechanism, strangeness enhancement, parton energy loss, and partonic collectivity in nucleus-nucleus collisions. Effect of later stage hadronic rescattering on elliptic flow (v2) of proton is also discussed relative to corresponding effect onϕmesonv2.

Download Full-text

The Small Acceptance Vertex Detector of NA61/SHINE

EPJ Web of Conferences ◽

10.1051/epjconf/201817121001 ◽

2018 ◽

Vol 171 ◽

pp. 21001

Author(s):

M. Deveaux ◽

A. Aduszkiewicz ◽

Y. Ali ◽

M. Baszczyk ◽

W. Brylinski ◽

...

Keyword(s):

Heavy Ion Collisions ◽

Particle Production ◽

Heavy Ion ◽

Open Charm ◽

Collision System ◽

Charm Mesons ◽

Vertex Detector ◽

Charmonium Production ◽

Ion Collisions ◽

Diagnostic Probe

Charmonium production in heavy ion collisions is considered as an important diagnostic probe for studying the phase diagram of strongly interacting matter for potential phase transitions. The interpretation of existing data from the CERN SPS is hampered by a lack of knowledge on the properties of open charm particle production in the fireball. Moreover, open charm production in heavy ion collisions by itself is poorly understood. To overcome this obstacle, the NA61/SHINE was equipped with a Small Acceptance Vertex Detector (SAVD), which is predicted to make the experiment sensitive to open charm mesons produced in A-A collisions at the SPS top energy. This paper will introduce the concept and the hardware of the SAVD. Moreover, first running experience as obtained in a commissioning run with a 150 AGeV/c Pb+Pb collision system will be reported.

Download Full-text

MESON PRODUCTION AT SPS ENERGIES

International Journal of Modern Physics A ◽

10.1142/s0217751x07036063 ◽

2007 ◽

Vol 22 (02n03) ◽

pp. 659-662 ◽

Cited By ~ 2

Author(s):

ANDRZEJ RYBICKI

Keyword(s):

Production Process ◽

Comparative Studies ◽

Initial Conditions ◽

Meson Production ◽

Heavy Ion ◽

Coulomb Interactions ◽

Final State ◽

Ion Collisions ◽

New Information ◽

Particle Spectra

Comparative studies of hadron-induced interactions and heavy ion collisions have been performed at beam energies of 158 GeV/nucleon, corresponding to [Formula: see text]. They indicate that the heavy ion reaction is a mixture of various processes, including multiple nucleon collisions, isospin effects, and final state Coulomb interactions. The latter interactions result in surprising phenomena, like the presence of large and strongly varying structures in the shape of double-differential particle spectra. These phenomena depend on the initial conditions of the reaction and therefore can provide new information on the space and time evolution of the non-perturbative meson production process.

Download Full-text

Measurement of the neutral and charged K* (892) mesons in the MPD experiment at NICA

EPJ Web of Conferences ◽

10.1051/epjconf/201922202005 ◽

2019 ◽

Vol 222 ◽

pp. 02005

Author(s):

Dmitry Ivanishchev ◽

Dmitry Kotov ◽

Evgeny Kryshen ◽

Mikhail Malaev ◽

Victor Riabov ◽

...

Keyword(s):

Heavy Ion Collisions ◽

Meson Production ◽

Feasibility Studies ◽

Heavy Ion ◽

Relativistic Heavy Ion Collisions ◽

Experimental Setup ◽

Parton Energy Loss ◽

Ion Collisions ◽

Systematic Uncertainties ◽

Charged Pions

Measurements of K*(892) meson production provide the means to study properties of relativistic heavy-ion collisions. Because of their short lifetimes, the charged and neutral K*(892) mesons provide information about the properties of the late hadronic phase due to the presence of rescattering and regeneration effects that can modify resonance yields. The K*(892) mesons can also be used to study the various mechanisms that shape particle transverse momentum (pT) spectra, including the collective flow, in-medium parton energy loss and recombination. Measurement of neutral K*(892) mesons requires reconstruction of the charged pions and kaons originating from the primary vertex. At the same time, the measurement of charged K*(892) mesons involves reconstruction of the weakly decaying Ks mesons. Simultaneous measurement of the two particles is a way to minimize systematic uncertainties of the corresponding physical studies. We present results of feasibility studies for measurement of the charged and neutral K*(892) mesons in the MPD experimental setup in heavy-ion collisions at NICA energies. Results are obtained using full-scale Monte Carlo simulations of the experimental setup.

Download Full-text

The Small Acceptance Vertex Detector of NA61/SHINE

EPJ Web of Conferences ◽

10.1051/epjconf/201817110003 ◽

2018 ◽

Vol 171 ◽

pp. 10003 ◽

Cited By ~ 3

Author(s):

M. Deveaux ◽

A. Aduszkiewicz ◽

Y. Ali ◽

M. Baszczyk ◽

W. Brylinski ◽

...

Keyword(s):

Heavy Ion Collisions ◽

Particle Production ◽

Heavy Ion ◽

Open Charm ◽

Collision System ◽

Charm Mesons ◽

Vertex Detector ◽

Charmonium Production ◽

Ion Collisions ◽

Diagnostic Probe

Charmonium production in heavy ion collisions is considered as an important diagnostic probe for studying the phase diagram of strongly interacting matter for potential phase transitions. The interpretation of existing data from the CERN SPS is hampered by a lack of knowledge on the properties of open charm particle production in the fireball. Moreover, open charm production in heavy ion collisions by itself is poorly understood. To overcome this obstacle, the NA61/SHINE was equipped with a Small Acceptance Vertex Detector (SAVD), which is predicted to make the experiment sensitive to open charm mesons produced in A-A collisions at the SPS top energy. This paper will introduce the concept and the hardware of the SAVD. Moreover, first running experience as obtained in a commissioning run with a 150 AGeV/c Pb+Pb collision system will be reported.

Download Full-text

Open Charm measurements at the NA61 experiment at CERN SPS

EPJ Web of Conferences ◽

10.1051/epjconf/201819105003 ◽

2018 ◽

Vol 191 ◽

pp. 05003

Author(s):

Dag Larsen ◽

Anastasia Merzlaya

Keyword(s):

Spatial Resolution ◽

High Spatial Resolution ◽

Open Charm ◽

Charm Production ◽

Strong Interactions ◽

Vertex Detector ◽

Exotic Particles ◽

The Future ◽

Open Charm Production ◽

Future Plans

The strong interactions programme of the NA61/SHINE experiment at CERN SPS has been extended through the use of new silicon Vertex Detector which provides precise measurements of exotic particles with short lifetime. The detector was designed to meet the challenges of primary and secondary vertexes reconstruction at high spatial resolution. An initial version of the Vertex Detector called SAVD (Small Acceptance Vertex Detector) was installed last end of 2016, and data was from Pb+Pb collisions was collected in 2016, for Xe+La in 2017, as well as further Pb+Pb collisions this year. First indication of a D0 peak at SPS energies has been observed. The physics motivation behind the open charm measurements will be discussed, as well as the analysis of collected data on open charm production and the future plans of open charm measurements in NA61/SHINE experiment related to the upgraded version of the vertex detector.

Download Full-text