Antihelium-3 production in lead-lead collisions at 158<i>A</i>GeV/<i>c</i>

Arsenescu, R.; Baglin, C.; Beck, H. P.; Borer, K.; Bussiére, A.; Elsener, K.; Gorodetzky, P.; Guillaud, J.P.; Kabana, S.; Klingenberg, R.; Lehmann, G.; Lindén, T.; Lohmann, K D; Mommsen, R. K.; Moser, U.; Pretzl, K.; Schacher, J.; Spiwoks, R.; Tuominiemi, J.; Weber, M.

doi:10.1088/1367-2630/5/1/301

Cited by 64 publications

(13 citation statements)

References 23 publications

(44 reference statements)

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“…It was further used as the model applied to data obtained at the Alternate Gradient Synchrotron (AGS) at Brookhaven National Laboratory (BNL) where several different experiments (E802/E866, E814, E864, E877, E878) have results on the production of light nuclei [68,69,70]. Furthermore, at the CERN SPS it was used for the interpretation of heavy-ion data at three different experiments (NA44, NA49, NA52) [71,72,73,74,75,76,77,78,79,80,81,82,83]. The model was also successfully applied to describe the yields of nuclei at RHIC [84,85,86,87,88,89,90].…”

Section: Coalescence Modelmentioning

confidence: 99%

Loosely-bound objects produced in nuclear collisions at the LHC

2019

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Loosely-bound objects such as light nuclei are copiously produced in proton-proton and nuclear collisions at the Large Hadron Collider (LHC), despite the fact that typical energy scales in such collisions exceed the binding energy of the objects by orders of magnitude. In this review we summarise the experimental observations, put them into context of previous studies at lower energies, and discuss the underlying physics. Most of the data discussed here were taken by the ALICE Collaboration during LHC Run1, which started in 2009 and ended in 2013. Specifically we focus on the production of (anti-)nuclei and (anti-)hypernuclei. Also included are searches for exotic objects like the H-dibaryon, a possible uuddss hexaquark state, or also a possible bound state of a Λ hyperon and a neutron. Furthermore, the study of hyperon-nucleon and hyperonhyperon interactions through measurements of correlations are briefly discussed, especially in connection with the possible existence of loosely-bound states composed of these baryons. In addition, some results in the strange and charmed hadron sector are presented, to show the capabilities for future measurements on loosely-bound objects in this direction. Finally, perspectives are given for measurements in the currently ongoing Run2 period of the LHC and in the future LHC Run3.

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Section: Coalescence Modelmentioning

confidence: 99%

Loosely-bound objects produced in nuclear collisions at the LHC

2019

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“…Deuterons and antideuterons are copiously produced in heavy-ion collisions [1][2][3][4][5][6][7][8][9][10][11], but less abundantly in lighter particle collisions, such as pp [12,13] and pp [14] collisions, photoproduction γp [15], and e + e − annihilation at ϒ(nS) [16] and Z 0 [17] energies. Measurements of heavier antinuclei, such as antitritons and 3 He nuclei, have only been reported in pA [18,19] and AA collisions [11,[20][21][22][23]. The high luminosity provided by the LHC allows these measurements to be extended to higher energies and transverse momenta (p T ) than in previous experiments, and provides in addition the possibility to detect for the first time antinuclei heavier than antideuterons in pp collisions.…”

Section: Introductionmentioning

confidence: 99%

Production of deuterons, tritons, He3 nuclei, and their antinuclei in pp collisions at s=

Acharya¹,

Adam²,

Adamová³

et al. 2018

Phys. Rev. C

105

128

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Invariant differential yields of deuterons and antideuterons in pp collisions at √ s = 0.9, 2.76 and 7 TeV and the yields of tritons, 3 He nuclei, and their antinuclei at √ s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (p T ) range in the rapidity interval |y| < 0.5, extending both the energy and the p T reach of previous measurements up to 3 GeV/c for A = 2 and 6 GeV/c for A = 3. The coalescence parameters of (anti)deuterons and 3 He nuclei exhibit an increasing trend with p T and are found to be compatible with measurements in pA collisions at low p T and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.

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“…APCP is known as the fourth state of matter, which consists of free charged ions and radicals moving in random directions. Although APCP has been extensively applied to the inactivation of liquid-borne or surface-borne agents (25)(26)(27)(28)(29)(30), only a few inactivation studies exposing airborne microbial agents to APCP have been conducted (31)(32)(33)(34). A recent study reported that a significant fraction (Ͼ85%) of airborne bacteria and fungi from both indoor and outdoor environments lost their viability within 60 ms of exposure to APCP (34).…”

mentioning

confidence: 99%

MS2 Virus Inactivation by Atmospheric-Pressure Cold Plasma Using Different Gas Carriers and Power Levels

Liang

Wei

et al. 2015

Appl Environ Microbiol

114

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In this study, airborne MS2 bacteriophages were exposed for subsecond time intervals to atmospheric-pressure cold plasma (APCP) produced using different power levels (20, 24, and 28 W) and gas carriers (ambient air, Ar-O 2 [2%, vol/vol], and He-O 2 [2%, vol/vol]). In addition, waterborne MS2 viruses were directly subjected to the APCP treatment for up to 3 min. MS2 viruses with and without the APCP exposure were examined by scanning electron microscopy (SEM), reverse transcription-PCR (RT-PCR), and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Viral inactivation was shown to exhibit linear relationships with the APCP generation power and exposure time (R 2 > 0.95 for all energy levels tested) up to 95% inactivation (1.3-log reduction) after a subsecond airborne exposure at 28 W; about the same inactivation level was achieved for waterborne viruses with an exposure time of less than 1 min. A larger amount of reactive oxygen species (ROS), such as atomic oxygen, in APCP was detected for a higher generation power with Ar-O 2 and He-O 2 gas carriers. SEM images, SDS-PAGE, and agarose gel analysis of exposed waterborne viruses showed various levels of damage to both surface proteins and their related RNA genes after the APCP exposure, thus leading to the loss of their viability and infectivity. Inhalation of microbial aerosol particles can cause various health effects, ranging from moderate respiratory impairments to death (1-3). Studies showed that large-scale infectious disease outbreaks, such as the outbreaks of severe acute respiratory syndrome in 2003 and influenza virus H1N1 in 2009, were triggered by airborne transmission of the viral agents (4-7). To reduce exposure to viruses, various methods have been developed and evaluated, including UV irradiation (8-11), chemical agents (12), electrical fields (13, 14), ion emission (15-18), ozone generation (19), and microwave irradiation (20-23). In recent years, atmospheric-pressure cold plasma (APCP), a low-temperature decontamination technology, has gained increased attention for the inactivation of microbial agents due to its high degree of effectiveness and low cost (24). APCP is known as the fourth state of matter, which consists of free charged ions and radicals moving in random directions. Although APCP has been extensively applied to the inactivation of liquid-borne or surface-borne agents (25-30), only a few inactivation studies exposing airborne microbial agents to APCP have been conducted (31-34). A recent study reported that a significant fraction (Ͼ85%) of airborne bacteria and fungi from both indoor and outdoor environments lost their viability within 60 ms of exposure to APCP (34). Reactive oxygen species (ROS) such as OH· were observed in the plasma produced using the air carrier, and bacterial membrane damage was detected in APCP-treated samples (34). Zimmermann et al. (2011) studied the inactivation of adenoviruses in a liquid suspension using APCP; up to a 6-decimal-log reduction was achieved following a 4-min exposure (35)....

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Antihelium-3 production in lead-lead collisions at 158AGeV/c

Cited by 64 publications

References 23 publications

Loosely-bound objects produced in nuclear collisions at the LHC

Loosely-bound objects produced in nuclear collisions at the LHC

Production of deuterons, tritons, He3 nuclei, and their antinuclei in pp collisions at s=

MS2 Virus Inactivation by Atmospheric-Pressure Cold Plasma Using Different Gas Carriers and Power Levels

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