Whisk the cilantro, mayonnaise, sour cream, lime juice and 1/2 teaspoon salt together in a large bowl.
Add the pasta to the boiling water and cook according to the package directions. Three minutes before the pasta is done, add the corn to the pot. Drain and rinse under cold water to cool and add to the bowl.
Add the beans, chicken, onions, tomatoes and jalapeno to the bowl and toss to combine. Season with salt and garnish with cilantro. The pasta salad is best if served right away.
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