New explanation of the GAMS results on the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>f</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mn>980</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>production in the reaction<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi><

Achasov, N. N.; Shestakov, G. N.

doi:10.1103/physrevd.58.054011

Cited by 33 publications

(27 citation statements)

References 50 publications

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“…The estimates fulfilled on the basis of Ref. [25] show, however, that, in this case, the amplitude M a 1 ++ can be neglected in comparison with the other ones for small −t.…”

Section: Amplitudes Of the Reactionmentioning

confidence: 82%

“…It should be immediately emphasized that the π exchange amplitude M π +− , which is forbidden by G-parity considerations, is essentially well known theoretically [3,5,25,26]. In Eqs.…”

Section: Amplitudes Of the Reactionmentioning

confidence: 99%

“…is the diagonal element of the polarization operator for the resonance r corresponding to the contribution of the ab intermediate state [25,26]…”

Section: Amplitudes Of the Reactionmentioning

confidence: 99%

“…• for m ≈ 1 GeV) of the elastic background accompanying the f 0 (980) resonance in the S-wave reaction ππ → ππ in the channel with isospin I = 0 [3,25,26].…”

Section: Amplitudes Of the Reactionmentioning

confidence: 99%

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Manifestation of thea00(980)−f0(980)mixing in the reaction
Achasov¹,
Shestakov²
2004
Phys. Rev. D
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It is argued that the single-spin asymmetry in the reaction π − p → a 0 0 (980)n → (ηπ 0 ) S n is extremely sensitive to the mixing of the a 0 0 (980) and f 0 (980) resonances. It is shown that at low momentum transfers (namely, in any one of the intervals 0 ≤ −t ≤ 0.025, ..., 0.1 GeV 2 ) the normalized asymmetry, which can take the values from −1 to 1, must undergo a jump in magnitude close to 1 in the ηπ 0 invariant mass region between 0.965 GeV and 1.01 GeV. The strong asymmetry jump is the straightforward manifestation of the a 0 0 (980) − f 0 (980) mixing. For observing the jump, any very high quality ηπ 0 mass resolution is not required. The energy dependence of the polarization effect is expected to be rather weak. Therefore, it can be investigated at any high energy, for example, in the range from eight to 100 GeV.

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“…The estimates fulfilled on the basis of Ref. [25] show, however, that, in this case, the amplitude M a 1 ++ can be neglected in comparison with the other ones for small −t.…”

Section: Amplitudes Of the Reactionmentioning

confidence: 82%

“…It should be immediately emphasized that the π exchange amplitude M π +− , which is forbidden by G-parity considerations, is essentially well known theoretically [3,5,25,26]. In Eqs.…”

Section: Amplitudes Of the Reactionmentioning

confidence: 99%

“…is the diagonal element of the polarization operator for the resonance r corresponding to the contribution of the ab intermediate state [25,26]…”

Section: Amplitudes Of the Reactionmentioning

confidence: 99%

“…• for m ≈ 1 GeV) of the elastic background accompanying the f 0 (980) resonance in the S-wave reaction ππ → ππ in the channel with isospin I = 0 [3,25,26].…”

Section: Amplitudes Of the Reactionmentioning

confidence: 99%

See 2 more Smart Citations

Manifestation of thea00(980)−f0(980)mixing in the reaction
Achasov¹,
Shestakov²
2004
Phys. Rev. D
Self Cite

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“…For example, the K + K − interaction is crucial for understanding the structure of the scalar mesons f 0 (980) and a 0 (980), which according Ref. [1,2] are KK molecules. In turn, the K − p interaction is interesting from the point of view of study the nature of the Λ(1405) hyperon, which is considered as a K − p molecular state [3].…”

mentioning

confidence: 99%

Near-threshold charged kaon pair production in two protons collisions

Gil

Smyrski

2016

EPJ Web Conf.

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Abstract. The pp → ppK + K − reaction was measured near threshold at excess energy Q = 4.5 MeV using the COSY-11 detection system installed at the COSY-Juelich accelerator. Preliminary value of upper limit of the total cross section was determined. This limit indicates that an enhancement of the total cross section close to the threshold, caused by the final state interaction, is smaller than suggested by extrapolation of data measured at higher energies. Physics motivationThe energy dependence of the pp → ppK + K − total cross section close to threshold is very sensitive to the interactions between particles in the final state, and therefore is well suited for studies of these interactions. There are many interesting topics connected with the interactions of the final state kaons and protons. For example, the K + K − interaction is crucial for understanding the structure of the scalar mesons f 0 (980) and a 0 (980), which according Ref. [1,2] are KK molecules. In turn, the K − p interaction is interesting from the point of view of study the nature of the Λ(1405) hyperon, which is considered as a K − p molecular state [3]. There are also some astrophysical aspects of studying kaons production reactions, like description of neutron stars structure [4]. Elementary reactions of kaon pair production in pp collisions are also important for better understanding of the properties of kaons inside dense baryonic matter [5]. The existing data for the kaon pair production in pp collisions were measured for excess energies higher than Q = 6 MeV, with exception of one point at 3 MeV, for which only upper limit of the total cross section was determined. On the other hand, data very close to threshold (for Q < 6 MeV) are crucial for distinguishing between various models of the final state interaction (FSI) in the ppK + K − system. Therefore, we performed a high luminosity measurement at Q = 4.5 MeV. ExperimentThe measurement was performed with the COSY-11 detection system, described in details in Ref. [6], at the COSY-Juelich accelerator. A principle of the measurement is presented in Fig. 1. Internal proton beam of the COSY was scattered on the COSY-11 H 2 cluster target. The beam momentum

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Mechanism for the f0(980) production in the reaction π−p→π0π0n

Achasov

Shestakov

2002

Physics Letters B

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New explanation of the GAMS results on thef0(980)production in the reactionπ−<

Cited by 33 publications

References 50 publications

Manifestation of thea00(980)−f0(980)mixing in the reaction
Achasov¹,
Shestakov²
2004
Phys. Rev. D
Self Cite

Manifestation of thea00(980)−f0(980)mixing in the reaction
Achasov¹,
Shestakov²
2004
Phys. Rev. D
Self Cite

Near-threshold charged kaon pair production in two protons collisions

Mechanism for the f0(980) production in the reaction π−p→π0π0n

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New explanation of the GAMS results on thef0(980)production in the reactionπ−<

Cited by 33 publications

References 50 publications

Manifestation of thea00(980)−f0(980)mixing in the reactionAchasov1, Shestakov2 2004Phys. Rev. DSelf Cite

Manifestation of thea00(980)−f0(980)mixing in the reactionAchasov1, Shestakov2 2004Phys. Rev. DSelf Cite

Near-threshold charged kaon pair production in two protons collisions

Mechanism for the f0(980) production in the reaction π−p→π0π0n

Contact Info

Product

Resources

About

Manifestation of thea00(980)−f0(980)mixing in the reaction
Achasov¹,
Shestakov²
2004
Phys. Rev. D
Self Cite

Manifestation of thea00(980)−f0(980)mixing in the reaction
Achasov¹,
Shestakov²
2004
Phys. Rev. D
Self Cite