A study of the reaction π+d→pp for pion energies between 142 and 262 MeV

Richard‐Serre, C.; Hirt, W.; Measday, D.F.; Michaélis, E.G.; Saltmarsh, M.J.; Skarek, P.

doi:10.1016/0550-3213(70)90329-9

Cited by 228 publications

(39 citation statements)

References 36 publications

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“…An accuracy of 1.3% was obtained for the shift, which matches with the theoretical uncertainty of 1.5% achieved recently [84,85]. The experimental uncertainty is dominated by the error of the calibration transition Ga Kα 2 (1.2%), which could be decreased by a factor [18,19]), this experiment, pion production and absorption cross sections ( [71][72][73][74][74][75][76][77]79,80]), and a selection of theoretical approaches ( [36,81,37,82,83]). …”

Section: Discussionsupporting

confidence: 57%

“…The parameter α as determined from pion production experiments shows wide fluctuations even when comparing recent data [71][72][73][74][75][76][77][78][79][80]. In some cases, only the statistical error is given for the cross section of the production experiments, but the fluctuations suggest significant systematic uncertainties, which may arise in uncertainties of the normalisation and/or the Coulomb corrections (Fig.…”

Section: Fig 12mentioning

confidence: 99%

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Pionic Deuterium

Strauch

Amaro

Anagnostopoulos

et al. 2010

EPJ Web of Conferences

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Section: Discussionsupporting

confidence: 57%

Section: Fig 12mentioning

confidence: 99%

Pionic Deuterium

Strauch

Amaro

Anagnostopoulos

et al. 2010

EPJ Web of Conferences

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“…[23,[27][28][29][30]34,[37][38][39]58]. The data from [35] and [59] were excluded, since they are far above the other data.…”

Section: Discussionmentioning

confidence: 99%

Charge independence studied in reactions

Machner

Niskanen

2006

Nuclear Physics A

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We investigate to what extent charge independence breaking (CIB) in isospin related reactions of the type NN → dπ can or could be seen in existing data. In doing this we perform fits to global and threshold cross sections including most recent data. Applying these we point out the probable impossibility to make model independent predictions even based solely on the different threshold energies and the well known pp → dπ + . A possible discrepancy is seen between the np → dπ 0 and pp → dπ + threshold data, which may require invoking other explicitly isospin symmetry breaking interactions than the Coulomb force and different threshold energies.

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“…This is an important reaction of pion production and its cross section is measured [24]. The cross section is theoretically explained assuming that the reaction has a contribution from ∆(1232) resonance (N * ) composed of a pion and a nucleon and the existence of state N N * [25,26].…”

Section: Input Physicsmentioning

confidence: 99%

“…(24). As the temperature decreases and the number density of energetic X particles decreases, resonant reaction rates for resonances of high energies are expected to become smaller.…”

Section: Comparison Of (Yȳ ) Formation Rate and The Hubble Expansimentioning

confidence: 99%

Resonant annihilation of long-lived massive colored particles through hadronic collisions

Kusakabe

Takesako

2012

Phys. Rev. D

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Hypothetical long-lived massive colored particles (MCPs or Y s) would be confined in colorless exotic strongly interacting massive particles (SIMPs) at color confinement temperature of TC ∼ 200 MeV. Two long-lived MCPs form a bound state (YȲ ) at collisions of two SIMPs. We study sensitivities of MCP annihilation to decay properties of resonances (YȲ ), and binding energies or energy levels of exotic SIMPs. The (YȲ ) formation is assumed to dominantly proceed through resonances of (YȲ ) in this paper. We make a toy model of the effective cross section for YȲ annihilation. Abundances of SIMPs are then calculated for different sets of parameters specifying properties of (YȲ ) resonances, binding energies of SIMPs, the initial abundance and the mass of MCP. Calculated relic abundances for respective SIMP species are 2 × 10 −8 -3 × 10 −4 times that of baryon. They can be much higher but cannot be much smaller than the previous estimate. The abundances can be consistent depending on parameters with the possible scenario that SIMPs bind to nuclei and subsequent exotic nuclear reactions reduce the primordial abundance of 7 Li or enhance those of 9 Be and/or B in the early Universe. A unique information on the quark-hadron phase transition in the early Universe may become available in future by elaborated studies on the annihilation process with light element abundances as observables.

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A study of the reaction π+d→pp for pion energies between 142 and 262 MeV

Cited by 228 publications

References 36 publications

Pionic Deuterium

Pionic Deuterium

Charge independence studied in reactions

Resonant annihilation of long-lived massive colored particles through hadronic collisions

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