On the production of $ \pi^{+}_{}$ $ \pi^{+}_{}$ pairs in pp collisions at 0.8 GeV

El-Samad, S. Abd; Bilger, R.; Brinkmann, K.-Th.; Clement, H.; Dietrich, M.H.; Doroshkevich, E.; Dshemuchadse, S.; Ehrhardt, K.; Erhardt, A.; Eyrich, W.; Filippi, A.; Freiesleben, H.; Fritsch, M.; Geyer, R.; Gillitzer, A.; Hauffe, J.; Hesselbarth, D.; Jaekel, R.; Jakob, B.; Karsch, L.; Kilian, K.; Kress, J. D.; Kuhlmann, E.; Marcello, S.; Marwinski, S.; Meier, R.; Möller, K.; Morsch, H. P.; Naumann, L.; Ritman, J.; Roderburg, E.; Schönmeier, P.; Schulte‐Wissermann, M.; Schröeder, Wolfgang; Stinzing, F.; Sun, G. Y.; Wachter, J.W.; Wagner, G. J.; Wagner, Mathias; Weidlich, U.; Wilms, A.; Wirth, S.; Zhang, G.; Żuprański, P.

doi:10.1140/epja/i2009-10877-3

Cited by 20 publications

(7 citation statements)

References 15 publications

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“…Starting first with the WASA/PROMICE detector setup, followed by the completed WASA detector at CELSIUS and finally at COSY all ppinduced, i.e. isovector two-pion production channels from threshold up to √ s = 2.5 GeV have been studied [323,324,325,326,327,328,329,330,331] complemented by a corresponding program with polarized beam at COSY-TOF [314,332]. The results for the total cross sections are shown in Fig.…”

Section: No Dibaryon Signal In Pp-induced Two-pion Productionmentioning

confidence: 99%

On the history of dibaryons and their final observation

Clement¹

2017

Progress in Particle and Nuclear Physics

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Section: No Dibaryon Signal In Pp-induced Two-pion Productionmentioning

confidence: 99%

On the history of dibaryons and their final observation

Clement¹

2017

Progress in Particle and Nuclear Physics

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138

125

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“…Early measurements of two-pion production initiated by nucleon-nucleon (NN) collisions were conducted with bubble chambers, where due to low statistics primarily only results for total cross sections were obtained [1][2][3][4][5][6][7]. In recent years the two-pion production has been measured from threshold up to incident energies of T p = 1.4 GeV with high accuracy by exclusive and kinematically complete experiments conducted at CELSIUS [8][9][10][11][12][13][14][15][16], COSY [17][18][19][20][21][22][23][24], GSI [25], and JINR [26]. Whereas initially proton-proton (pp)-induced twopion production was the primary aim of these measurements [8][9][10][11][12][13][14][15][17][18][19], the interest moved later to proton-neutron (pn)induced reaction channels, after the first clear-cut evidence for a dibaryon resonance with I (J P ) = 0(3 + ) had been observed in the pn → dπ 0 π 0 reaction [16,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years the two-pion production has been measured from threshold up to incident energies of T p = 1.4 GeV with high accuracy by exclusive and kinematically complete experiments conducted at CELSIUS [8][9][10][11][12][13][14][15][16], COSY [17][18][19][20][21][22][23][24], GSI [25], and JINR [26]. Whereas initially proton-proton (pp)-induced twopion production was the primary aim of these measurements [8][9][10][11][12][13][14][15][17][18][19], the interest moved later to proton-neutron (pn)induced reaction channels, after the first clear-cut evidence for a dibaryon resonance with I (J P ) = 0(3 + ) had been observed in the pn → dπ 0 π 0 reaction [16,20,21]. Subsequent measurements of the pn → dπ + π − [22], pn → ppπ 0 π − [23], np → np π 0 π 0 [24], and pn → pnπ + π − [25,27] reactions revealed that all two-pion production channels, which contain isoscalar contributions, exhibit a signal of this resonance, now called d * (2380) after observation of its pole in pn scattering [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Examination of the production of an isotensor dibaryon in the pp→ppπ+π− reaction

Adlarson¹,

Augustyniak²,

Bardan³

et al. 2019

Phys. Rev. C

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P. ADLARSON et al. PHYSICAL REVIEW C 99, 025201 (2019) The quasifree pp → ppπ + π − reaction has been measured by means of pd collisions at T p = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region T p = 1.08-1.36 GeV ( √ s = 2.35-2.46 GeV) covering thus the regions of N * (1440) and (1232) (1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp → ppπ 0 π 0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor N dibaryon resonance with I (J P ) = 2(1 + ) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

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“…Overall, the process scrutinized here corresponds on the target side to a nn → pp + ππreaction. In free space, the corresponding charge-conjugated reaction pp → nn + π + π + reaction and other double-pion production channels were in fact already investigated experimentally at CELSIUS and COSY [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163] and later also at HADES [164]. Thus these correlations are expected to be present also in more involved nuclear reactions.…”

Section: Analogy Between Dce Reactions and 0νββ Decaymentioning

confidence: 96%

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

et al. 2018

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The article describes the main achievements of the NUMEN project together with an updated and detailed overview of the related R&D activities and theoretical developments. NUMEN proposes an innovative technique to access the nuclear matrix elements entering the expression of the lifetime of the double beta decay by cross section measurements of heavy-ion induced Double Charge Exchange (DCE) reactions. Despite the two processes, namely neutrinoless double beta decay and DCE reactions, are triggered by the weak and strong interaction respectively, important analogies are suggested. The basic point is the coincidence of the initial and final state many-body wave-functions in the two types of processes and the formal similarity of the transition operators. First experimental results obtained at the INFN-LNS laboratory for the 40 Ca( 18 O, 18 Ne) 40 Ar reaction at 270 MeV, give encouraging indication on the capability of the proposed technique to access relevant quantitative information.The two major aspects for this project are the K800 Superconducting Cyclotron and MAGNEX spectrometer. The former is used for the acceleration of the required high resolution and low emittance heavy ion beams and the latter is the large acceptance magnetic spectrometer for the detection of the ejectiles. The use of the high-order trajectory reconstruction technique, implemented in MAGNEX, allows to reach the experimental resolution and sensitivity required for the accurate measurement of the DCE cross sections at forward angles. However, the tiny values of such cross sections and the resolution requirements demand beam intensities much larger than manageable with the present facility. The on-going upgrade of the INFN-LNS facilities in this perspective is part of the NUMEN project and will be discussed in the article.3

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On the production of $ \pi^{+}_{}$ $ \pi^{+}_{}$ pairs in pp collisions at 0.8 GeV

Cited by 20 publications

References 15 publications

On the history of dibaryons and their final observation

On the history of dibaryons and their final observation

Examination of the production of an isotensor dibaryon in the pp→ppπ+π− reaction

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

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