sharp and pixel like edges. (photoshop)?

Question: My logo has very rough/sharp and pixel like edges!. (photoshop)!?

Ok, so i'm using photoshop to work on a logo, and i have one problem!. The logo is circular, but it has very rough, pixel like edges!. It gets even worse when i zoom in!. My question is, how do i get rid of these edges, so that i can get a smooth circular surface!? i dont want this rough and pixel like edges to show up when i put them onto a T-shirt!. Thanks in advance

afterwards, would this have anything to do with vector format!?

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Best Answer - Chosen by Asker:

Yes, it is down to vectors and bitmaps!. Photoshop is a bitmap (pixel) image processing programme, and although uses vectors for certain things, once rasterised these are turned again into bitmap files which gives you the pixelisation!.
Adobe Illustrator works with bezier curves and is vector based so might be a better option for you with this project!.
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