The term "beam state matter" is not a standard term in physics or chemistry. It's possible that it's a colloquial term or a concept from a specific field that hasn't gained widespread recognition.

To understand what you might be referring to, I need more context. Can you provide any of the following?

* Where did you encounter this term? (e.g., a book, a lecture, a website)

* What was the context? (e.g., what were you reading or learning about when you came across the term?)

* What do you think it might mean?

With more information, I can try to help you decipher the meaning of "beam state matter" or suggest related concepts that might be relevant.