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Journal articles on the topic 'Chargino'

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1

Gulayeva, A. K., M. Sh Gojayev, and S. K. Abdullayev. "The production of a chargino pair in muon colliders (I)." Izvestiya vysshikh uchebnykh zavedenii. Fizika, no. 5 (2022): 95–104. http://dx.doi.org/10.17223/00213411/65/5/95.

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Within the framework of the Minimal Supersymmetric Standard Model, the process of the production of a pair of charginos in polarized muon-antimuon collisions is considered. Taking into account arbitrary polarizations of the pair, as well as the longitudinal or transverse polarization of the chargino, general expressions for the cross sections of the process are obtained. The longitudinal and transverse spin asymmetries caused by the polarizations of the pair, as well as the degrees of transverse and longitudinal polarization of the chargino, are determined. The angular and energy dependences of the polarization characteristics and the effective cross section are studied in detail.
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2

TRIGGER, ISABEL. "SEARCH FOR CHARGINOS AND NEUTRALINOS BY THE OPAL COLLABORATION AT LEP." International Journal of Modern Physics A 16, supp01b (September 2001): 778–80. http://dx.doi.org/10.1142/s0217751x01008072.

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Searches for charginos and neutralinos predicted by supersymmetric theories, are performed using data taken at center-of-mass energies of up to 209 GeV. No significant excesses are found, so constraints are placed on the cross-section of possible chargino and neutralino production in electron-positron collisions.
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3

ALDERWEIRELD, THOMAS. "SEARCH FOR CHARGINOS AND NEUTRALINOS WITH THE DELPHI DETECTOR AT LEP." International Journal of Modern Physics A 16, supp01b (September 2001): 775–77. http://dx.doi.org/10.1142/s0217751x01008060.

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Search for charginos and neutralinos are presented, based on the data samples recorded in 1999 and 2000 by the DELPHI detector at centre-of-mass energies from 192 to 209 GeV. No evidence for a signal was found. The lower chargino mass limits are 5-6 GeV /c2 higher than those obtained at a centre-of-mass energy of 189 GeV. The (μ, M 2) MSSM domain excluded by combining the chargino searches with neutralino searches at the Z resonance implies a limit on the mass of the lightest neutralino which, for a heavy sneutrino, is constrained to be above 37.6 GeV /c2 for tan β≥1. Upper limit at 95% CL on the neutralino production cross-section times branching fraction are derived.
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4

Kalinowski, J. "Measuring the chargino parameters." Pramana 55, no. 1-2 (July 2000): 259–64. http://dx.doi.org/10.1007/s12043-000-0103-4.

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5

Choi, S. Y., A. Djouadi, H. Dreiner, J. Kalinowski, and P. M. Zerwas. "Chargino pair production in." European Physical Journal C 7, no. 1 (1999): 123. http://dx.doi.org/10.1007/s100520050392.

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6

ROY, SOUROV. "ANOMALY MEDIATED SUPERSYMMETRY BREAKING AND ITS TEST IN LINEAR COLLIDERS." Modern Physics Letters A 19, no. 02 (January 20, 2004): 83–98. http://dx.doi.org/10.1142/s0217732304012897.

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Signatures of anomaly mediated supersymmetry breaking in linear colliders are briefly reviewed after presenting an outline of the theoretical framework. A unique and distinct feature of a large class of models of this type is a winolike chargino which is very closely degenerate in mass with the lightest neutralino. The very slow decay of this chargino results in a heavily ionizing charged track and one soft charged pion with a characteristic momentum distribution, leading to unique signals in linear colliders which are essentially free of background. The determination of chargino and slepton masses from such events is a distinctly interesting possibility.
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7

Chankowski, Piotr H., and Stefan Pokorski. "Chargino mass and Rb anomaly." Nuclear Physics B 475, no. 1-2 (September 1996): 3–26. http://dx.doi.org/10.1016/0550-3213(96)00317-3.

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8

Bartl, A., H. Fraas, W. Majerotto, and B. M�sslacher. "Chargino production at LEP 200." Zeitschrift f�r Physik C Particles and Fields 55, no. 2 (June 1992): 257–64. http://dx.doi.org/10.1007/bf01482587.

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9

Djouadi, A., Y. Mambrini, and M. Mühlleitner. "Chargino and neutralino decays revisited." European Physical Journal C 20, no. 3 (May 2001): 563–84. http://dx.doi.org/10.1007/s100520100679.

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10

Fraas, H., F. Franke, G. Moortgat-Pick, F. von der Pahlen, and A. Wagner. "Precision measurements of Higgs-chargino couplings in chargino pair production at a muon collider." European Physical Journal C 29, no. 4 (August 2003): 587–95. http://dx.doi.org/10.1140/epjc/s2003-01249-6.

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11

LEIKE, A. "CAN THE MINIMAL SUSY EXTENSION OF THE STANDARD MODEL BE RULED OUT BY CHARGINO PRODUCTION AT e+e− COLLIDERS?" International Journal of Modern Physics A 03, no. 12 (December 1988): 2895–910. http://dx.doi.org/10.1142/s0217751x8800120x.

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It is discussed how the parameters of gaugino mixing in the minimal supersymmetric extension of the Standard Model may be determined in future experiments, for example at LEP or SLC. If charginos are produced at LEP the gaugino mixing parameters can be measured for the case that the sneutrinos are very heavy or for the case that at least one sneutrino is lighter than the light chargino and the ratio of the vacuum expectation values of the two Higgs doublets is closed to 1. In this cases the model could be ruled out.
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12

LEIKE, A. "MEASURING THE CHARGINO MIXING PARAMETERS OF THE MINIMAL SUSY EXTENSION OF THE STANDARD MODEL AT e+e− COLLIDERS IN THE TEV REGION." International Journal of Modern Physics A 04, no. 04 (February 1989): 845–55. http://dx.doi.org/10.1142/s0217751x89000388.

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It is proposed to measure the parameters of the chargino mixing of the minimal supersymmetric extension of the standard model by chargino pair production at e+e− colliders with TeV energies. Some information about the lightest SUSY particle and its mass can be gained. With a polarized beam the minimal SUSY extension of the Standard model could be ruled out.
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13

Khalil, Shaaban, and Oleg Lebedev. "Chargino contributions to ε and ε′." Physics Letters B 515, no. 3-4 (August 2001): 387–94. http://dx.doi.org/10.1016/s0370-2693(01)00880-2.

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14

Pei-Jun, Zhou, Ma Wen-Gan, Zhang Ren-You, and Wan Lang-Hui. "Supersymmetric Electroweak Corrections to the Decay of the Heavy Chargino into the Light Chargino and Z Boson." Communications in Theoretical Physics 38, no. 2 (August 15, 2002): 173–80. http://dx.doi.org/10.1088/0253-6102/38/2/173.

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15

Akeroyd, A. G., Marco A. Dı́az, and José W. F. Valle. "Tau lepton mixing with charginos and its effects on chargino searches at e+e− colliders." Physics Letters B 441, no. 1-4 (November 1998): 224–34. http://dx.doi.org/10.1016/s0370-2693(98)01191-5.

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16

Rodriguez, M. C. "Double Chargino Production in e−e− scattering." International Journal of Modern Physics A 22, no. 31 (December 20, 2007): 6080–88. http://dx.doi.org/10.1142/s0217751x07039250.

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We point out the production of the charginos and neutralinos in electron-electron process in several supersymmetric models, in order to show that the International Linear Collider can discover double charged charginos if these particles really exist in nature.
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17

Hesselbach, S., and H. Fraas. "Chargino-sneutrino production in electron-photon collisions." Physical Review D 55, no. 3 (February 1, 1997): 1343–52. http://dx.doi.org/10.1103/physrevd.55.1343.

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18

Gluza, J., and T. Wöhrmann. "Chargino production at an e−e− collider." Physics Letters B 408, no. 1-4 (September 1997): 229–34. http://dx.doi.org/10.1016/s0370-2693(97)00780-6.

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19

Hikasa, Ken-ichi, and Takaaki Nagano. "Probing the sgeneration spectrum in chargino decays." Physics Letters B 435, no. 1-2 (September 1998): 67–72. http://dx.doi.org/10.1016/s0370-2693(98)00778-3.

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20

Abreu, P., W. Adam, T. Adye, E. Agasi, I. Ajinenko, R. Aleksan, G. D. Alekseev, et al. "Search for the lightest chargino at GeV." Physics Letters B 382, no. 3 (August 1996): 323–36. http://dx.doi.org/10.1016/0370-2693(96)00769-1.

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21

Ackerstaff et al., K. "Search for chargino and neutralino production at." European Physical Journal C 2, no. 2 (1998): 213. http://dx.doi.org/10.1007/s100520050134.

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22

Abbiendi et al., G. "Search for chargino and neutralino production at." European Physical Journal C 8, no. 2 (1999): 255. http://dx.doi.org/10.1007/s100520050462.

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23

Abbiendi et al., G. "Search for chargino and neutralino production at." European Physical Journal C 14, no. 2 (2000): 187. http://dx.doi.org/10.1007/s100520050746.

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24

Choi, S. Y., A. Djouadi, H. Dreiner, J. Kalinowski, and P. M. Zerwas. "Chargino pair production in $e^+e^-$ collisions." European Physical Journal C 7, no. 1 (February 1999): 123–34. http://dx.doi.org/10.1007/s100530050356.

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25

Choi, S. Y., A. Djouadi, H. Dreiner, J. Kalinowski, and P. M. Zerwas. "Chargino pair production in $e^+e^-$ collisions." European Physical Journal C 7, no. 1 (February 1999): 123–34. http://dx.doi.org/10.1007/pl00021667.

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26

Garisto, R., and J. N. Ng. "Supersymmetric b→sγ with large chargino contributions." Physics Letters B 315, no. 3-4 (October 1993): 372–78. http://dx.doi.org/10.1016/0370-2693(93)91627-y.

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27

Bartl, A., H. Fraas, and W. Majerotto. "Signatures of chargino production ine + e − collisions." Zeitschrift für Physik C Particles and Fields 30, no. 3 (September 1986): 441–49. http://dx.doi.org/10.1007/bf01557609.

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28

SAIF, H. N. "SEARCH FOR CHARGINO AND NEUTRALINO PRODUCTION AT THE LHC IN THE LEFT-RIGHT SUPERSYMMETRIC MODEL." Modern Physics Letters A 09, no. 12 (April 20, 1994): 1131–40. http://dx.doi.org/10.1142/s0217732394000940.

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An extension of the supersymmetric Standard Model to the left-right supersymmetric model (L-R SUSY), SU (2) L × SU (2) R × U (1)B-L, is considered. We investigate the possibility of detecting chargino and neutralino production at the LHC [Formula: see text] through the process [Formula: see text]. A numerical analysis is presented for the chargino mass [Formula: see text] neutralino mass [Formula: see text] and tan θκ = 1.6. Based on reasonable assumptions on W R , and assuming g L ≃ g R ≃ g, we take MW R = 1 TeV . The results are compared with the conventional background signal of the process [Formula: see text].
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29

Choi, S. Y., J. S. Shim, H. S. Song, and W. Y. Song. "Impacts of the CP-odd phase of the chargino mass matrix in light chargino-pair production at LEP II." Physics Letters B 449, no. 3-4 (March 1999): 207–13. http://dx.doi.org/10.1016/s0370-2693(99)00089-1.

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30

DATTA, ASESHKRISHNA, MONORANJAN GUCHAIT, and KYOUNG KEUN JEONG. "STOP SQUARK SEARCH AT TEVATRON IN THE LIGHT SLEPTON SCENARIO." International Journal of Modern Physics A 14, no. 14 (June 10, 1999): 2239–55. http://dx.doi.org/10.1142/s0217751x99001123.

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In minimal-supergravity-based supersymmetry models the charged sleptons as well as the sneutrinos may be lighter than the squarks. In such a light slepton scenario search for the lighter stop squark has been investigated in the dilepton + missing pT[Formula: see text](≥ 1) channel at Tevatron. In this scenario semileptonic decay of the lighter stop squark has been considered via off-shell and on-shell charginos. In the latter case the chargino undergoes pure leptonic two-body decay. We observe that for some favorable region of the MSSM parameter space one can probe the lighter stop squark mass up to 140 GeV with few events in the present data set for which the luminosity is 110 pb -1. At the MI upgrade one is likely to end up with more events.
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31

LAFAGE, V., T. ISHIKAWA, Y. KURIHARA, T. KANEKO, T. KON, and H. TANAKA. "SPIN AND SPIN–SPIN CORRELATIONS IN CHARGINO PAIR PRODUCTION AT FUTURE LINEAR e+e- COLLIDERS." International Journal of Modern Physics A 14, no. 32 (December 30, 1999): 5075–92. http://dx.doi.org/10.1142/s0217751x99002396.

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A possibility to measure the spin and spin–spin correlations of a chargino pair is investigated in the process [Formula: see text] at future linear-collider energies. The total and the differential cross sections are calculated by the [Formula: see text] system which allows for the full spin correlation. Experimental sensitivity of the measurements are examined by assuming the limited detector resolution, the initial state radiation and the beam–beam effect (beamstrahlung). It is found that generally the spin–spin correlation can only be measured with a lower sensitivity than the chargino spin itself. The dependence of the correlation measurements on the relevant SUSY parameters can be seen for a light [Formula: see text] case, but the situation becomes worse for a heavier [Formula: see text].
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32

Yuan, Jia-Rong, Hua-Jie Cheng, and Xu-Ai Zhuang. "Prospects for chargino pair production at the CEPC *." Chinese Physics C 46, no. 1 (January 1, 2022): 013104. http://dx.doi.org/10.1088/1674-1137/ac2f93.

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Abstract The proposed Circular Electron Positron Collider (CEPC) with a center-of-mass energy GeV will primarily serve as a Higgs factory. Additionally, it will offer good opportunities to search for new physics phenomena at low energies, which can be challenging with hadron colliders; however, these discoveries are highly motivated by theoretical models developed to explain, e.g., the relic abundance of dark matter. This paper presents sensitivity studies for chargino pair production by considering scenarios for both a Bino-like and a Higgsino-like neutralino as the lightest supersymmetric particle and using a full Monte Carlo (MC) simulation. By assuming systematic uncertainties at the level of 5%, the CEPC has the ability to discover chargino pair production up to the kinematic limit of for both scenarios. The results have a minor dependence on the reconstruction model and detector geometry. These results can also be considered as a reference and benchmark for similar searches at other proposed electron-positron colliders, such as the Future Circular Collider ee (FCC-ee) or the International Linear Collider (ILC), given the similar nature of the facilities, detectors, center-of-mass energies, and target luminosities.
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33

Obara, Midori, and Noriyuki Oshimo. "Generation mixing of sneutrinos in heavier chargino decay." Journal of High Energy Physics 2006, no. 08 (August 23, 2006): 054. http://dx.doi.org/10.1088/1126-6708/2006/08/054.

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34

Kribs, Graham D., Adam Martin, and Tuhin S. Roy. "Supersymmetry with a chargino NLSP and gravitino LSP." Journal of High Energy Physics 2009, no. 01 (January 8, 2009): 023. http://dx.doi.org/10.1088/1126-6708/2009/01/023.

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35

Mayer, T., and H. Fraas. "Chargino production and decay in photon–photon collisions." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 472, no. 1-2 (October 2001): 165–70. http://dx.doi.org/10.1016/s0168-9002(01)01177-9.

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36

Ghodbane, Nabil, Stavros Katsanevas, Imad Laktineh, and Janusz Rosiek. "Chargino searches at LEP for complex MSSM parameters." Nuclear Physics B 647, no. 1-2 (December 2002): 190–214. http://dx.doi.org/10.1016/s0550-3213(02)00944-6.

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37

Wu, Xiao-Hong, and Da-Xin Zhang. "Chargino contribution to the rare decay b→ssd̄." Physics Letters B 587, no. 1-2 (May 2004): 95–99. http://dx.doi.org/10.1016/j.physletb.2004.02.067.

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38

Díaz, Marco A., and Steve F. King. "Chargino production at LEP2 in a supergravity model." Physics Letters B 373, no. 1-3 (April 1996): 100–106. http://dx.doi.org/10.1016/0370-2693(96)00097-4.

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39

Choi, S. Y., A. Djouadi, H. S. Song, and P. M. Zerwas. "Determining SUSY parameters in chargino pair-production in." European Physical Journal C 8, no. 4 (1999): 669. http://dx.doi.org/10.1007/s100520050503.

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40

Mayer, T., C. Blöchinger, F. Franke, and H. Fraas. "Chargino production and decay in photon-photon collisions." European Physical Journal C 27, no. 1 (March 2003): 135–43. http://dx.doi.org/10.1140/epjc/s2002-01095-0.

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41

Endo, Motoi, Satoshi Mishima, Daiki Ueda, and Kei Yamamoto. "Chargino contributions in light of recent ϵ′/ϵ." Physics Letters B 762 (November 2016): 493–97. http://dx.doi.org/10.1016/j.physletb.2016.10.009.

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42

Wöhrmann, T., and H. Fraas. "Associate sneutrino-neutralino/chargino production at LEP ⊗ LHC." Physics Letters B 336, no. 1 (September 1994): 107–12. http://dx.doi.org/10.1016/0370-2693(94)00947-3.

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43

BOZ, MÜGE, and NAMIK K. PAK. "THE NEUTRALINO MASS: CORRELATION WITH THE CHARGINOS." Modern Physics Letters A 21, no. 20 (June 28, 2006): 1609–23. http://dx.doi.org/10.1142/s0217732306019724.

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As the fundamental SU(2) supersymmetric parameters can be determined in the chargino sector, and the remaining fundamental parameters of the minimal supersymmetric extensions of the standard model can be analyzed in the neutralino sector, the two sectors can be correlated via these parameters. We have shown that for the CP-conserving case, the masses of all the neutralinos can be determined in terms of the chargino masses and tan β. In this case the neutralino masses are quite insensitive to the variations of tan β, they change by about 15% when tan β varies in the range from 5 to 50. In the CP-violating case, the neutralino masses are found to be quite sensitive to the variations of the CP-violating phase. For the heavier neutralinos the dependence of the masses to the CP-violating phase show complementary behavior at CP-violating points.
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44

Frank, Mariana, and Shuquan Nie. "Chargino contributions to / in the left–right supersymmetric model." Journal of Physics G: Nuclear and Particle Physics 30, no. 2 (January 12, 2004): 181–89. http://dx.doi.org/10.1088/0954-3899/30/2/015.

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45

Aoki, M., N. Oshimo, and A. Sugamoto. "Electroweak Baryogenesis from Chargino Transport in the Supersymmetric Model." Progress of Theoretical Physics 98, no. 5 (November 1, 1997): 1179–91. http://dx.doi.org/10.1143/ptp.98.1179.

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46

Kilian, W., J. Reuter, and T. Robens. "NLO event generation for chargino production at the ILC." European Physical Journal C 48, no. 2 (November 2006): 389–400. http://dx.doi.org/10.1140/epjc/s10052-006-0048-y.

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47

Sonmez, Nasuf. "Pair production of the lightest chargino at γγ-collider." Nuclear Physics B 939 (February 2019): 233–52. http://dx.doi.org/10.1016/j.nuclphysb.2018.12.019.

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48

Díaz, Marco A., Steve F. King, and Douglas A. Ross. "Radiative corrections to chargino production in electron-positron collisions." Nuclear Physics B 529, no. 1-2 (September 1998): 23–61. http://dx.doi.org/10.1016/s0550-3213(98)00611-7.

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49

Bartl, A., K. Hohenwarter-Sodek, T. Kernreiter, O. Kittel, and M. Terwort. "CP observables with spin–spin correlations in chargino production." Nuclear Physics B 802, no. 1-2 (October 2008): 77–91. http://dx.doi.org/10.1016/j.nuclphysb.2008.04.031.

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50

Bartl, A., H. Fraas, O. Kittel, and W. Majerotto. "CP violation in chargino production and decay into sneutrino." Physics Letters B 598, no. 1-2 (September 2004): 76–82. http://dx.doi.org/10.1016/j.physletb.2004.07.055.

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