What are my chances for Caltech as a student with low GPA and is writing a research paper?

The research paper is my only extra-curricular. It is based on Quantum Physics(I intend to major in Physics).
I am an International student.

More details needed. What is your GPA and test scores. What are you going to do with this paper?

My older brother and I go to Caltech. A high GPA is needed for them to even consider your application: GPA is a low priority for Caltech admissions because everyone there has the same high school grades.

@sgopal2 I haven’t taken the SAT tests yet…well only my junior year GPA is a little low (got a couple of C’s and D’s)
I intend to publish the paper once it is ready ( hopefully by the end of 2017).

Article isnt yet accepted for publication in a juried journal? And you have c’s and D’s? Best to find another school.